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entitled 'Oil and Gas Royalties: A Comparison of the Share of Revenue 
Received from Oil and Gas Production by the Federal Government and 
Other Resource Owners' which was released on June 1, 2007. 

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United States Government Accountability Office: Washington, DC 20548: 

GAO-07-676R: 

May 1, 2007: 

The Honorable Jeff Bingaman: 
Chairman: 
Committee on Energy & Natural Resources: 
United States Senate: 

The Honorable Nick J. Rahall II: 
Chairman: 
Committee on Natural Resources: 
House of Representatives: 

The Honorable Stevan Pearce: 
Ranking Member: 
Subcommittee on Energy and Mineral Resources: 
Committee on Natural Resources: 
House of Representatives: 

The Honorable Mary L. Landrieu: 
United States Senate: 

Subject: Oil and Gas Royalties: A Comparison of the Share of Revenue 
Received from Oil and Gas Production by the Federal Government and 
Other Resource Owners: 

Amid rising oil and gas prices and reports of record oil industry 
profits, a number of governments have taken steps to reevaluate and, in 
some cases, increase the share of oil and gas revenues they receive for 
the rights to develop oil and gas on their lands and waters. For 
example, the State of Alaska has recently passed new oil and gas 
legislation that will increase the state’s share of revenue received 
from oil and gas companies operating state leases. In January 2007, the 
Department of the Interior announced an increase in the royalty rate 
for future leases granted in the deepwater region of the Gulf of 
Mexico. Companies engaged in exploration and development of oil and gas 
resources do so under terms of concessions, leases, or contracts 
granted by governments or other resource owners. The terms and 
conditions of such arrangements are established by law or negotiated on 
a case-by-case basis. One important aspect of the arrangements is the 
applicable payments from the companies to the resource owners—in the 
United States, these include bonuses, rentals, royalties, corporate 
income taxes, and special fees or taxes. The precise mix and total 
amount of these payments, referred to as the “fiscal system” varies 
widely across different resource owners. The total revenue, as a 
percentage of the value of the oil and natural gas produced, received 
by government resource owners, such as U.S. federal or state 
governments is commonly referred to as the “government take.” For 
example, a government take of 50 percent means that the government 
receives 50 percent of the cash flow produced from an oil or gas field. 

In fiscal year 2006, oil and gas companies received over $77 billion 
from the sale of oil and gas produced from federal lands and waters, 
and the Department of the Interior’s Minerals Management Service (MMS) 
reported that these companies paid the federal government about $10 
billion in oil and gas royalties. Clearly, such large and financially 
significant resources must be carefully developed and managed so that 
our nation’s rising energy needs are met while at the same time the 
American people are ensured of receiving a fair rate of return on 
publicly owned resources, especially in light of the nation’s daunting 
current and long-range fiscal challenges. 

As requested, this report documents the information provided to your 
staffs in March 2007 on the U.S. government’s take and implications 
associated with increasing royalty rates. Specifically, this report 
discusses (1) the United States’ government take relative to that of 
other government resource owners and (2) the potential revenue 
implications of raising royalty rates on federal oil and gas leases 
going forward. To address the government take, our work included 
reviewing results of studies done by oil companies and industry 
consultants. We also collected and analyzed various studies generated 
by MMS, the agency responsible for collecting oil and gas royalties 
from federal lands and waters. In addition, we reviewed results of 
studies prepared over the last 13 years by various private and 
government sources on government take and interviewed Alaskan state and 
private consulting firm officials. In evaluating the study results we 
conducted interviews with study authors and an industry expert to 
discuss the study methodologies and the appropriate interpretation of 
the results. Based on these interviews and our review of study results, 
we believe the general approach that these study authors took was 
reasonable and that the study authors are credible. However, we did not 
fully evaluate each study’s methodology or the underlying data used to 
make the government take estimates. Overall, because all the studies 
came to similar conclusions with regard to the relative government-take 
ranking of the U.S. federal government and because such studies are 
used by oil and gas industry companies and governments alike for the 
purposes of evaluating the relative competitiveness of specific fiscal 
systems, we are confident that the broad conclusions of the studies are 
valid. To address the revenue implications of raising royalty rates, we 
gathered information from reports, studies, and government documents, 
and drew from past GAO reports related to oil and gas royalties. We 
also discussed the material in this report with MMS officials and they 
made helpful suggestions about the factors affecting the revenue 
implications of raising royalty rates. Our work was done from January 
2007 through March 2007 in accordance with generally accepted 
government auditing standards. 

In Summary: 

Based on results of a number of studies, the U.S. federal government 
receives one of the lowest government takes in the world. Collectively, 
the results of five studies presented in 2006 by various private sector 
entities show that the United States receives a lower government take 
from the production of oil in the Gulf of Mexico than do states—such as 
Colorado, Wyoming, Texas, Oklahoma, California, and Louisiana—and many 
foreign governments. Other government-take studies issued in 2006 and 
prior years similarly show that the United States has consistently 
ranked low in government take compared to other governments. For 
example, a study completed in 2006 for MMS showed that the U.S. federal 
government take in the Gulf of Mexico deepwater and shallow water was 
lower than 29 and 26, respectively, of the 31 fiscal systems analyzed. 
In deciding where and when to invest oil and gas development dollars, 
companies consider the government take as well as other factors, 
including the size and availability of the oil and gas resources in the 
ground; the costs of finding and developing these resources, including 
labor costs and the costs of compliance with environmental regulations; 
and the stability of the fiscal system and the country in general. All 
else held equal, more investment dollars will flow to regions in which 
the government take is relatively low, where there are large oil and 
gas deposits that can be developed at relatively low cost, and where 
the fiscal system and government are deemed to be relatively more 
stable. Regarding the deepwater areas of the U.S. Gulf of Mexico, the 
current size of the government take, the relatively large estimated 
amounts of oil and gas in the ground, and the proximity to the large 
U.S. market for oil and gas make this region a favorable place to 
invest. However, the high costs of operating in deepwater may deter 
some investment. 

Increasing royalty rates on future federal oil and gas leases would 
likely increase the federal government take but by less than the 
percentage increase in the royalty rate because higher royalty rates 
would likely reduce some taxes and other fees and may also discourage 
some development and production. For example, the recently announced 
increase in royalty rates from 12.5 percent to 16.67 percent on future 
leases sold in the deepwater regions of the Gulf of Mexico will, 
according to MMS, increase overall federal revenues but will also cause 
reductions in some fees and in oil and gas production. Specifically, 
MMS estimates that the new royalty rate of 16.67 percent will increase 
revenue by $4.5 billion over 20 years. MMS also estimates that, by 
2017, this increased revenue will be partially offset by revenue losses 
of $820 million over 20 years as a result of reduced rental fees as 
well as a decline in production of 5 percent. A lower royalty rate can 
encourage oil companies to pursue oil exploration and production and 
thereby provide an economic stimulus to oil producing regions. For 
example, according to a MMS study issued in 2006, as the industry 
expands output in the Gulf of Mexico, employment levels in all Gulf 
Coast states—including Alabama, Louisiana, Mississippi, and Texas—tend 
to rise to meet industry needs. As part of an energy strategy to meet 
the nation’s energy needs and balance the impacts of energy use on the 
environment and climate, a healthy domestic oil and natural gas 
industry is essential, and that means that the United States must 
continue to create a market that is competitive in attracting 
investment in oil and natural gas development. Such development, 
however, should not mean that the American people forgo a competitive 
and fair rate of return for the extraction and sale of these natural 
resources, especially in light of the current and long-range fiscal 
challenges facing our nation. The potential trade-offs between higher 
revenue collections and higher oil production highlight the broader 
challenge of striking a balance between meeting the nation’s increasing 
energy needs and ensuring a fair rate of return for the American people 
from oil production on federally leased lands and waters. 

Background: 

The Department of the Interior, created by the Congress in 1849, 
oversees and manages the nation’s publicly owned natural resources, 
including parks, wildlife habitat, and crude oil and natural gas 
resources on over 500 million acres onshore and in the waters of the 
Outer Continental Shelf. In this capacity, the Department of the 
Interior is authorized to lease federal oil and gas resources and to 
collect the royalties associated with their production. The Department 
of the Interior’s Bureau of Land Management is responsible for leasing 
federal oil and natural gas resources on land, whereas, offshore, MMS 
has the leasing authority. To lease lands or waters for oil and gas 
exploration, companies generally must first pay the federal government 
a sum of money that is determined through a competitive auction. This 
money is called a bonus bid. After the lease is awarded and production 
begins, the companies must also pay royalties to MMS based on a 
percentage of the cash value of the oil and gas produced and sold. 
[Footnote 1] Royalty rates for onshore leases are generally 12 and a 
half percent whereas offshore, they range from 12 and a half percent 
for water depths of 400 meters or deeper (referred to as deepwater) to 
16 and two-thirds percent for water depths less than 400 meters 
(referred to as shallow). However, the Secretary of the Interior 
recently announced plans to raise the royalty rate to 16 and two-thirds 
percent for most future leases issued in waters 400 meters or deeper. 
MMS also has the option of taking a percentage of the actual oil and 
natural gas produced, referred to as “taking royalties in kind,” and 
selling this energy itself or using it for other purposes, such as 
filling the nation’s Strategic Petroleum Reserve. In addition to bonus 
bids and royalties, companies pay taxes on corporate profits. The sum 
of all these and other payments comprises the government take. Because 
different governments set different levels of taxes, fees, and 
royalties, the relative size of any one component of government take 
generally varies across different fiscal systems. 

Study Results Indicate That the Federal Government Receives among the 
Lowest Government Takes in the World: 

Results of five studies presented in reports or testimony to the 
Alaskan state legislature in 2006 indicate that the federal government 
receives one of the lowest government takes among the jurisdictions 
evaluated. The hearing was held to discuss a proposed new state tax on 
oil company profits. This proposal eventually was adopted and, in 2006, 
the State of Alaska enacted a new oil and gas production tax law which 
imposed a 22.5 percent tax on oil company profits. Two of the studies 
presented were from major oil companies, and three were from private 
consulting firms. The five studies had differing scopes and somewhat 
different estimates of government take. For example, one study focused 
primarily on comparing U.S. federal, state, and Canadian fiscal 
systems, while other studies focused on international comparisons. The 
results of the five studies are summarized below and in more detail in 
enclosure I. [Footnote 2] 

* BP (formerly British Petroleum), one of the world’s largest oil 
companies. testified that the federal government’s take for leases in 
the Gulf of Mexico (45 percent) was lower than 9 out of 10 other fiscal 
systems presented, including Colorado, Wyoming, Texas, Oklahoma, 
California, and Louisiana (between 51 percent and 57 percent). 

* ConocoPhillips, Alaska’s number-one oil producer in 2005, testified 
that the federal government’s take for leases in the Gulf of Mexico (43 
percent) was lower than all 8 other fiscal systems presented, including 
the United Kingdom (52 percent) and Norway (76 percent). 

* CRA International (formerly Charles River Associates), a global firm 
specializing in business consultancy and economics, testified that the 
federal government’s take in the Gulf of Mexico—both deepwater (42 
percent) and shallow water (50 percent)—was lower than the 6 other 
fiscal systems it evaluated, including Australia (61 percent). 

* Daniel Johnston and Company, an independent petroleum advisory firm 
providing services to the oil and gas industry, testified that the 
federal government’s take in the Gulf of Mexico for deepwater (between 
37 and 41 percent) was 4th lowest and for shallow water (between 48 and 
51 percent) was 8th lowest among 50 fiscal systems it evaluated. 

* Van Meurs Corporation—a company which provides international 
consulting services in several areas including petroleum legislation, 
contracts, and negotiations—reported that the federal government’s take 
in the Gulf of Mexico (40 percent) was the lowest among 10 fiscal 
systems it evaluated, including Alaska (53 percent) and Angola (64 
percent). 

It should be recognized that the studies presented in this testimony 
were done before the recent increase in the royalty rate for future 
deepwater leases in the Gulf of Mexico. This action will, as new leases 
are added to the mix over time, cause the average government take in 
the Gulf of Mexico to rise somewhat. In addition, 4 of the 5 studies 
compared government take based on 11 fiscal systems or fewer. A 
comparison of a much larger number of fiscal systems provides more 
comprehensive information. In this regard, we found that other expanded 
government-take studies have been issued. These are summarized below 
and more details are presented in enclosure II.

* A study issued in 2006 and done under contract with MMS by the 
Coastal Marine Institute of the Louisiana State University reported on 
31 fiscal systems in 25 countries. The study showed, out of the 31 
fiscal systems, Gulf of Mexico deepwater, at between 38 and 42 percent, 
was lower than 29 other systems and Gulf of Mexico shallow water, at 
between 48 percent and 51 percent, was lower than 26 systems. Three 
other offshore fiscal systems were also shown. This included Trinidad & 
Tobago offshore with a government take between 48 percent and 50 
percent, Australia offshore with a government take of between 53 
percent and 56 percent, and Egypt offshore with a government take of 
between 79 percent and 82 percent. Of the 31 fiscal systems presented, 
Mexico had the lowest government take at between 30 percent and 32 
percent, and, at the other end of the spectrum, Venezuela had the 
highest government take at between 88 percent and 93 percent. 

* A second study, issued in 2002 by Wood MacKenzie, a private 
consulting firm, analyzed 61 fiscal systems within 50 countries. The 
study showed that, out of 61 fiscal systems, Gulf of Mexico deepwater 
ranked lower than 54 other systems with a federal government take of 
about 42 percent, while Alaska’s government take was about 64 percent. 
Of the 61 fiscal systems analyzed, Cameroon had the lowest government 
take at about 11 percent, and at the other end of the spectrum, Iran 
had the highest government take at about 93 percent. 

* A third study, issued by Van Meurs Corporation in 1997, analyzed 324 
fiscal systems in 159 countries. The study showed that, out of 324 
fiscal systems, Gulf of Mexico water greater than 800 meters ranked 
lower than 298 other systems with a federal government take of about 41 
percent and Gulf of Mexico water between 200 and 400 meters ranked 
lower than 276 systems with a federal government take of about 47 
percent. The study also indicated that governments tend to compete 
regionally and that the regional average government take for countries 
within North America was about 57 percent. 

* Finally, one of the first expanded, or comprehensive, studies was 
completed by Van Meurs Corporation in 1994 for the World Bank. That 
study showed that the government take from federal onshore lands, Gulf 
of Mexico deepwater, and Gulf of Mexico shallow, ranked lower than 194, 
191, and 180 out of 226 fiscal systems in 144 countries, territories, 
and joint development zones analyzed. 

The last few years of high oil and gas prices and record industry 
profits have been a factor in causing a number of resource owners to 
reevaluate their fiscal systems. For example, and as already discussed, 
the State of Alaska enacted in 2006, a new oil and gas production tax 
law which, among other things, imposed a 22.5 percent tax on oil 
company profits. In addition, at least five states—including New 
Jersey, New York, Pennsylvania, Washington, and Wisconsin—and Alberta 
Province in Canada are considering new oil and gas tax legislative 
proposals. The level of government take can influence investment in oil 
and gas development and production. Resource owners are competing to 
some extent for finite private investment in oil and gas development, 
and in considering the ideal government take, the resource owners must 
consider that there may be a trade-off between the magnitude of 
government take and the level of investment. From the oil and gas 
industry’s perspective, government take represents one of the costs of 
doing business. As with any industry, if the costs in one geographic 
area increase, industry may pursue locations elsewhere. 

In addition to the overall government take, the mix of taxes, fees, and 
royalty rates that comprise the government take may also be important 
in determining the level of investment. For example, in commenting on 
Alaska’s then-proposed revisions to its oil and gas tax law, a BP 
official testified that a fiscal system should be equitable to 
investors and the government alike and should be profit-related, that 
is, with a tax levied on profits not revenues. Similarly a 
ConocoPhillips official testified that a balanced fiscal system is 
critical for future oil and gas investment in Alaska and that Alaska 
must maintain its fiscal system competitiveness on a global basis. 

Further, the size of oil and gas reserves, the costs of exploration and 
development, and the stability of the government and regulatory 
environment play a role in companies’ investment decisions. In many 
regards, the United States is a desirable place to invest in oil and 
gas development and production. For example, of non-OPEC countries, the 
United States held almost 10 percent of oil reserves as of 2006. In 
addition, including the existence of a nearby market for all that is 
produced, the United States is generally considered a stable place to 
invest, especially when compared to many countries, such as Venezuela 
and Nigeria, that have large oil and gas reserves. For example, in 
Venezuela, it was reported last year that the government had taken a 
series of steps to increase the government take as well as take greater 
control over oil operations in that country, and in Nigeria, it was 
recently reported that there have been repeated instances of oil 
company employees being kidnapped or attacked. However, much of the 
estimated oil reserves in the United States, such as those in the 
deepwater areas of the Gulf of Mexico, and the smaller pockets of oil 
remaining in mature oil fields will be more costly to develop than oil 
in some other regions, and these higher costs are a deterrent for 
investment. In addition, to the extent that environmental regulations 
in the United States are stricter than in some other oil producing 
countries, this could increase compliance costs and necessitate to some 
extent a lower government take in the United States. Further, to the 
extent that labor costs are a factor in determining the profitability 
of oil development projects, the United States may have higher labor 
costs than some other oil producing countries, and this would also 
necessitate, to some extent, a lower government take. 

Increasing Royalty Rates on Future Federal Oil and Gas Leases Would 
Likely Increase the Federal Government Take: 

Increasing royalty rates on future federal oil and gas leases would 
likely increase the federal government take but by less than the 
percentage increase in the royalty rate itself because higher royalty 
rates will likely reduce some taxes and other fees and may also 
discourage some development and production compared to what it would be 
under lower government take conditions. For example, because the 
federal government assesses taxes on corporate profits, an increase in 
royalty rates would raise oil and gas company costs, thereby reducing 
their profits and, consequently, the corporate income taxes they pay. 
In addition, an increase in royalty rates may reduce the amount, in 
fees or bonuses, oil and gas companies are willing to pay for the 
rights to develop individual leases. Because such fees or bonuses are 
determined competitively, this may lead to lower government revenue. 
Finally, higher royalty rates may deter some development or production 
of oil and gas if companies can find more profitable investment 
opportunities elsewhere and for which other factors, such as stability 
and the amount of oil and gas reserves are comparable. 

MMS’ analysis that accompanied a recently announced increase in the 
royalty rate for new federal deepwater offshore Gulf of Mexico leases 
illustrates how the increase in royalty rates can be offset somewhat by 
reduced fees and production. MMS estimates that the increased royalty 
rate of 16.67 percent—from 12.5 percent—will increase revenue from 
royalty payments by $4.5 billion over 20 years. However, MMS also 
recognized that this royalty rate increase will likely cause declines 
in bonus and rental revenues as well as reduce oil and gas production 
compared to what it would have been under the lower royalty rate. 
Specifically, MMS estimated a decline of bonus and rental revenues 
amounting to $820 million over 20 years and a decline in production of 
5 percent, or 110 million barrels of oil equivalent, over 20 years 
compared to what production would have been at the lower rate. 
Nonetheless, MMS estimates that by 2017, the net increase in total 
revenue will still be substantial. 

In addition to revenue considerations, there are a number of other 
considerations that could be considered when establishing a royalty 
rate or the overall government take. These include environmental issues 
and socioeconomic effects. Royalties or other fees or taxes may reduce 
the amount of investment in oil and gas development and production and, 
therefore, to the extent that higher royalty rates reduce oil and gas 
development and production in the United States, could be used as a 
policy tool to reduce the domestic environmental impacts of oil and gas 
development. Regarding socioeconomic effects of oil and gas development 
and production, a 2006 study done under contract for MMS noted that as 
the oil and gas industry expands output in the Gulf of Mexico, 
employment levels in all Gulf Coast states—including Alabama, 
Louisiana, Mississippi, and Texas—tend to rise to meet industry needs. 
[Footnote 3] 

As agreed with your offices, unless you publicly announce the contents 
of this report earlier, we plan no further distribution until 30 days 
from the date of this report. At that time, we will send copies to 
appropriate congressional committees, the Secretary of the Interior, 
the Director of MMS, the Director of the Office of Management and 
Budget, and other interested parties. We will also make copies 
available to others upon request. In addition, the report will be 
available at no charge on GAO’s Web site at [hyperlink, 
http://www.gao.gov].

If you or your staff have any questions or comments about this report, 
please contact me at (202) 512-3841 or gaffiganm@gao.gov. Contact 
points for our Offices of Congressional Relations and Public Affairs 
may be found on the last page of this report. GAO staff who made 
contributions to this report include Frank Rusco, Assistant Director; 
Robert Baney; Dan Novillo; Dawn Shorey; Barbara Timmerman; and Maria 
Vargas. 

Signed by: 

Mark E. Gaffigan: 
Acting Director: 
Natural Resources and Environment: 

Enclosures:

[End of section] 

Enclosure I: Government Take Summaries Presented in 2006 to the Alaska 
State Legislature: 

Fiscal System: North America: Canada – Alberta 1 (before project 
becomes profitable); 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 39; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].
 
Fiscal System: North America: US Outer Continental Shelf (OCS) 
deepwater; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty}; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 37-41; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: US Gulf of Mexico (GOM) deepwater; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 
[Empty}; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 42; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 
[Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 
[Empty].

Fiscal System: North America: US GOM shallow water; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty}; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 50; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: US GOM Total; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): 45; Government Take 
(%)[a]: Presenters: Conoco Phillips[b]: 43; Government Take (%)[a]: 
Presenters: CRA International[c]: [Empty]; Government Take (%)[a]: 
Presenters: Daniel Johnston and Company[d]: [Empty]; Government Take 
(%)[a]: Presenters: Van Meurs Corporation[e] 40.

Fiscal System: North America: US OCS shallow water; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 48-
51; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Colorado; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): 51; 
Government Take 
(%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take 
(%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Canada – Alberta - Oil Sands; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 
[Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 50.

Fiscal System: North America: Canada Total; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: 51; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Wyoming; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): 52; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Texas; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 53; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Oklahoma; Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): 53; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: California; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): 53; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Canada – Artic; 
Government Take (%)[a]: 
Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 58; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Canada – Alberta 2 (after project becomes 
profitable); 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 54; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: North America: Alaska (Current/Proposed); 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 56/61; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 63/68; 
Government Take (%)[a]: Presenters: CRA International[c]: 53/63; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 
[Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 53/56.

Fiscal System: North America: Louisiana; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): 57; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Argentina; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 45-48; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: United Kingdom; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 52; 
Government Take (%)[a]: Presenters: CRA International[c]: 52; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 30-32; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 50.

Fiscal System: Countries Elsewhere: Bolivia; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 55-58; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Ecuador; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 56-61; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Australia; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: 61; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 57-59; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Peru; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 63-65; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Guatemala; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 63-68; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Colombia; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 68-70; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Fiscal System: Countries Elsewhere: Angola; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 73; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 66-71; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 64.

Fiscal System: Countries Elsewhere: Russia-Sakhjalin; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 69-
72; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 70.

Fiscal System: Countries Elsewhere: Azerbaijan; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 75; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 68-72; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 54.

Fiscal System: Countries Elsewhere: Norway; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 76; 
Government Take (%)[a]: Presenters: CRA International[c]: 74; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 73-76; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 77.

Fiscal System: Countries Elsewhere: Nigeria; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: 77; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: [Empty]; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] 52.

Fiscal System: Countries Elsewhere: Venezuela; 
Government Take (%)[a]: Presenters: BP (formerly British Petroleum): [Empty]; 
Government Take (%)[a]: Presenters: Conoco Phillips[b]: [Empty]; 
Government Take (%)[a]: Presenters: CRA International[c]: [Empty]; 
Government Take (%)[a]: Presenters: Daniel Johnston and Company[d]: 89-91; 
Government Take (%)[a]: Presenters: Van Meurs Corporation[e] [Empty].

Source: GAO analysis; data to the Alaska State Legislature, 2006. 

Note: The United States’ government take from oil production in the 
Gulf of Mexico and the Outer Continental Shelf is bolded in the table. 

[a] Government take is the total percent of revenue taken from 
production, regardless of whether a tax, a royalty, a bonus, or some 
other method of taking revenue. 

[b] The information presented by ConocoPhillips was taken from a 2004 
study by Wood Mackenzie “Global Oil and Gas Risk and Reward Study.” 
ConocoPhillips presented its government-take information using a 
plotting graph but did not assign a specific value to each point that 
was plotted. We estimated the government take for each point based on 
where that point appeared in the graph. 

[c] CRA International is a global firm specializing in business 
consulting and economics. CRA International presented its government 
take information using a plotting graph but did not assign a specific 
value to each point that was plotted. We estimated the government take 
for each point based on where that point appeared on the graph. 

[d] Daniel Johnston and Company is an independent international 
petroleum advisory firm providing services to the exploration and 
development sector of the oil and gas industry. Percentages provided by 
this company are based on discounted and undiscounted dollars. This 
company presented its government-take information using a bar graph but 
did not assign a specific value to each bar shown. We estimated the 
government take for each bar based on the length of that bar on the 
graph. 

[e] Van Meurs Corporation provides international consulting services in 
several areas including petroleum legislation, contracts, and 
negotiations.

[End of enclosure] 

Enclosure II: Three Expanded Studies on Government Take: 

Fiscal System: Cameroon; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 10.86;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Ireland; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 19.92;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Ireland-frontier terms; 
Government Take (%): 1997 Private consulting firm study[a]: 25.10; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Mexico; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 30-32.

Fiscal System: United Kingdom-general; 
Government Take (%): 1997 Private consulting firm study[a]: 33.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Moldova; 
Government Take (%): 1997 Private consulting firm study[a]: 34.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Kazakhstan-Oman Oil. Co.; 
Government Take (%): 1997 Private consulting firm study[a]: 35.10; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Canada (East Coast); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 35.17;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Pakistan - possible new deepwater terms; 
Government Take (%): 1997 Private consulting firm study[a]: 37.00;
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: New Zealand; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 37.51;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: U.S. (Deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 38-42.

Fiscal System: Falkland Islands; 
Government Take (%): 1997 Private consulting firm study[a]: 40.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Argentina - general; 
Government Take (%): 1997 Private consulting firm study[a]: 40.50; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: United Kingdom - shallow water; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 40.77;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: U.S. (deepwater/greater than 800 meters); 
Government Take (%): 1997 Private consulting firm study[a]: 41.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: U.S. (deepwater/greater than 800 meters); 
Government Take (%): 1997 Private consulting firm study[a]: 41.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Netherlands offshore; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 41.92;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: U.S. (Gulf of Mexico deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 42.10;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Italy; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 42.62;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: China (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 42.81;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Italy (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: 43.00; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: United Kingdom - South Gas Basin; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 43.54;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Poland; 
Government Take (%): 1997 Private consulting firm study[a]: 44.60; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Pakistan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 45.46;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Australia (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 45.51;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Phillipines; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 46.12;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Argentina; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 46.93;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Argentina; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 47-49.

Fiscal System: Denmark; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 47.20;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Brazil (shelf); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 47.88;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Trinidad and Tobago (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 48-50.

Fiscal System: U.S. (shallow water); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 48-51.

Fiscal System: U.S. (shallow water/less than 200 meters); 
Government Take (%): 1997 Private consulting firm study[a]: 49.12; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Peru (offshore Block Z-29); 
Government Take (%): 1997 Private consulting firm study[a]: 49.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Venezuela; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 49.56;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Congo (Brazzaville); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 50.57;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Thailand; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 50.56;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Kazakhstan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 51.88;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: U.S. Alaska (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: 52.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Papua New Guinea; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 52.27;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Myanmar; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 54.00;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Philippines (deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: 54.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Cote d'Ivory; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 55.34;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Chad; 
Government Take (%): 1997 Private consulting firm study[a]: 55.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Bolivia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 55.71;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Malaysia-Thailand; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 56.21; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Canada - Newfoundland (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: 56.70; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Colombia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 57.12;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Canada - Alberta oil sands; 
Government Take (%): 1997 Private consulting firm study[a]: 57.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Ecuador; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 57.75;  
Government Take (%): 2006 MMS study[c]: [Empty].

Fiscal System: Ecuador; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 58-60. 

Fiscal System: Peru; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 58-62. 

Fiscal System: Ecuador - Triton contract; 
Government Take (%): 1997 Private consulting firm study[a]: 58.80; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Pakistan - Zone 3; 
Government Take (%): 1997 Private consulting firm study[a]: 58.90; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: U.S. - Texas (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: 59.00; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Equatorial Guinea; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 59.69; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Angola (deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 59.93; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Brazil (deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 60.19; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Bolivia - traditional; 
Government Take (%): 1997 Private consulting firm study[a]: 60.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: India; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 61-69. 

Fiscal System: Bangladesh; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 61.18;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Australia (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: 61.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Azerbaijan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 61.54;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Netherlands (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 61.67; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Trinidad and Tobago (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 62-66. 

Fiscal System: Australia (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 62-66. 

Fiscal System: Tunisia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 63-66. 

Fiscal System: Egypt - Mediterranean West Delta Deep; 
Government Take (%): 1997 Private consulting firm study[a]: 63.60; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]  

Fiscal System: Timor Gap; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 63.94;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Alaska; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 64.24;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Joint Development Area (Thailand-Malaysia); 
Government Take (%): 1997 Private consulting firm study[a]: 64.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Nigeria (deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 64.62; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Peru - Camisea; 
Government Take (%): 1997 Private consulting firm study[a]: 65.50; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Canada - Alberta - Third Tier No Tax Credit; 
Government Take (%): 1997 Private consulting firm study[a]: 66.70; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: India; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 66.82;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Republic of Congo; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 67-69. 

Fiscal System: Papua New Guinea; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 67-76. 

Fiscal System: Malaysia (deepwater); 
Government Take (%): 1997 Private consulting firm study[a]: 67.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Turkmenistan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 68.06;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Trinidad and Tobago (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: 68.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Vietnam; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 68.55;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Trinidad and Tobago (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 69.00; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Indonesia (East); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 69-71. 

Fiscal System: Malaysia (frontier); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 69-74. 

Fiscal System: Thailand; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 69-74. 

Fiscal System: Gabon; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 69-76. 

Fiscal System: Peru - Murphy contract; 
Government Take (%): 1997 Private consulting firm study[a]: 69.60; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Indonesia (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 71.01; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Algeria; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 71.72;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Gabon (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 71.81;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Timor Gap - ZOCA; 
Government Take (%): 1997 Private consulting firm study[a]: 72.00; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: China; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 72-77. 

Fiscal System: Yamen; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 72-79. 

Fiscal System: Egypt (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 73.04;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Gabon (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 73.38;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Brunei; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 73.90;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: China (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: 74.10; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Angola (shelf); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 74.11;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Azerbaijan - AIOC; 
Government Take (%): 1997 Private consulting firm study[a]: 74.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Egypt (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 74.27;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Russia - Komi Republic; 
Government Take (%): 1997 Private consulting firm study[a]: 74.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Yemen - Nimir - revised; 
Government Take (%): 1997 Private consulting firm study[a]: 74.60; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Thailand - Gulf of Thailand; 
Government Take (%): 1997 Private consulting firm study[a]: 74.70; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Norway; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 74.74;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Peru; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 75.04;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Yemen; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 75.36;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Myanmar - Amoco contract; 
Government Take (%): 1997 Private consulting firm study[a]: 76.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Sudan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 76.96;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Egypt - (onshore contract - Marathon); 
Government Take (%): 1997 Private consulting firm study[a]: 78.30; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Peru - Block 52 (Chevron); 
Government Take (%): 1997 Private consulting firm study[a]: 78.70; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Libya; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 78.73;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Colombia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 79-82. 

Fiscal System: Egypt (offshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 79-82. 

Fiscal System: Vietnam; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 79-82.

Fiscal System: Tunisia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: 79-85.  

Fiscal System: Qatar; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 79.09;  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Papua New Guinea; 
Government Take (%): 1997 Private consulting firm study[a]: 79.80; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty];  
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Indonesia (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 80.13; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Gabon; 
Government Take (%): 1997 Private consulting firm study[a]: 80.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Angola; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 81-88. 

Fiscal System: Brunei (offshore less than 10 miles); 
Government Take (%): 1997 Private consulting firm study[a]: 81.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Malaysia; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 81.24; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Russia - Sakhalin 2; 
Government Take (%): 1997 Private consulting firm study[a]: 81.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Brunei; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 82-84. 

Fiscal System: Kazakhstan; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 83-88.

Fiscal System: Syria; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 83-87.

Fiscal System: Oman; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 83.19; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Yemen (Norsk Hydro contract); 
Government Take (%): 1997 Private consulting firm study[a]: 83.90; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Norway - North Sea; 
Government Take (%): 1997 Private consulting firm study[a]: 84.20; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Syria (Model PSC); 
Government Take (%): 1997 Private consulting firm study[a]: 84.50; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Egypt (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 85-90. 

Fiscal System: Indonesia (pre-tertiary); 
Government Take (%): 1997 Private consulting firm study[a]: 85.00; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Nigeria - Niger Delta; 
Government Take (%): 1997 Private consulting firm study[a]: 85.00; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Nigeria (onshore); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 87.21; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Indonesia - West; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 87-89. 

Fiscal System: Nigeria (shelf); 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 87.44; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Kazakhstan (Tengiz JV); 
Government Take (%): 1997 Private consulting firm study[a]: 87.40; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Malaysia (onshore); Government Take (%): 1997 Private 
consulting firm study[a]: [Empty]; Government Take (%): 2002 Private 
consulting firm study[b]: [Empty]; Government Take (%): 2006 MMS 
study[c]: 88-91. 

Fiscal System: Venezuela; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: 88-93. 

Fiscal System: Colombia; 
Government Take (%): 1997 Private consulting firm study[a]: 89.60; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Iran; 
Government Take (%): 1997 Private consulting firm study[a]: [Empty]; 
Government Take (%): 2002 Private consulting firm study[b]: 93.26; 
Government Take (%): 2006 MMS study[c]: [Empty]. 

Fiscal System: Venezuela - G'Piche Block); 
Government Take (%): 1997 Private consulting firm study[a]: 95.10; 
Government Take (%): 2002 Private consulting firm study[b]: [Empty]; 
Government Take (%): 2006 MMS study[c]: [Empty].  

Source: GAO analysis; government take data from Internet.  

Note: Fiscal systems are listed in numerical order from lowest to 
highest for each study. In some cases, certain fiscal systems are 
listed more than once in this table to show their relative ranking in 
each study. The government take for U.S. deepwater and shallow water in 
each study is bolded in the table. 

[a] Analyzed 324 fiscal systems in 159 countries. Fifty fiscal systems 
are presented in this table. Information about this study was obtained 
from an article appearing in the May 26, 1997 issue of the Oil and Gas 
Journal.  

[b] Information about this study was obtained from a May 2004 
presentation by the Alaska Oil and Gas Association.  

[c] Capital Investment Decisionmaking and Trends: Implications on 
Petroleum Resource Development in the U. S. Gulf of Mexico, MMS 2006-
064 (October 2006). The study contained government-take information on 
31 fiscal systems in 25 countries. The information in this study about 
government take was excerpted from a 1994 private consulting firm 
report. 

[End of enclosure] 

Footnotes: 

[1] Specifically, royalties are computed as a percentage of the monies 
received from the sale of oil and gas, with the total federal royalty 
revenue equal to the volume sold multiplied by the sales price 
multiplied by the royalty rate.  

[2] The studies estimated slightly different government takes for the 
Gulf of Mexico. This is partially explained by the fact that some 
studies average the government take for the entire Gulf of Mexico, 
while others distinguish between the shallow and deepwater regions, 
which have different lease and royalty terms and therefore different 
government takes. Other variation may exist as a result of changes over 
time that are reflected in when the study data were collected as well 
as somewhat different methodologies used by the study authors to 
calculate government take.  

[3] Minerals Management Service, Economic Effects of Petroleum Prices 
and Production in the Gulf of Mexico OCS on the U.S. Gulf Coast 
Economy, MMS 2006-063 (October 2006).