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GAO-02-882R: 

United States General Accounting Office: 
Washington, DC 20548: 

July 26, 2002: 

Congressional Requesters: 

Subject: Review of the Estimates for the Impact of the September 11, 
2001, Terrorist Attacks on New York Tax Revenues: 

As a follow-up to our May 2002 report, [Footnote 1] reviewing the 
estimates of the economic impact of the September 11, 2001, terrorist 
attacks on New York, you requested additional information on New York 
tax revenues. Specifically, you asked us to review the estimates of tax 
revenue losses that the New York City Office of Management and Budget 
and the New York State Division of Budget attribute to the terrorist 
attacks. Both these budget offices estimated that the terrorist attacks 
would reduce anticipated tax revenues to the city and state in both 
fiscal years 2002 and 2003. [Footnote 2] The purpose of this report is 
to present our review of these estimates. 

To respond to your request, we reviewed the budget offices’ estimates 
and supporting analyses, using standard economic analysis principles. 
These include establishing a baseline of New York tax revenues absent 
the terrorist attacks, measuring the incremental effect of the attacks, 
and using economic models or sound professional judgment. We discussed 
the estimates and the supporting analyses with officials from the New 
York budget offices, as well as the Federal Reserve Bank of New York,
the New York City Office of the Comptroller, the New York City 
Independent Budget Office, the New York State Financial Control Board, 
the Office of the New York State Comptroller, the Office of the State 
Deputy Comptroller for New York City, the Fiscal Policy Institute, 
[Footnote 3] and DRI-WEFA. [Footnote 4] We did not validate the budget 
offices’ data or models. We carried out our work from May through July 
2002 in accordance with generally accepted government auditing 
standards. 

Summary: 

The budget offices’ estimates of the tax revenue losses have 
limitations, such as including some of the economic slowdown that was 
under way at the time of the attacks. Nevertheless, the tax revenue 
loss estimates for the 2002 fiscal year—about $1.6 billion for New York 
City and $1.6 billion for New York State—appear to reasonably 
approximate the impact of the terrorist attacks on tax revenues. The tax
revenue loss estimates for the 2003 fiscal year—about $1.4 billion for 
New York City and $4.2 billion for New York State—are more uncertain 
because they depend on some factors that are yet to be determined, such 
as the degree to which the attacks have made New York City a less 
attractive location for businesses. 

Precisely measuring the effect of the terrorist attacks on economic 
activity and related tax revenues is inherently difficult. Such 
measuring requires disentangling the effect of the attacks from the 
effects of other events. The budget offices assumed that the entire 
difference in estimated tax revenues between a pre-September 11 revenue 
forecast and a revised post-September 11 revenue forecast was a result 
of the terrorist attacks. But other factors may also have contributed 
to the decline in revenues. For example, the slowdown in the economy 
that was under way at the time of the attacks contributed to lower-than-
anticipated tax revenues in many states, including New York. In 
addition, any effect of events that occurred after the attacks—such as 
the economic fallout from the collapse of Enron and accounting firm 
improprieties—would also be included in the budget offices’ estimates 
of tax revenue losses. In commenting on a draft of this report, the New 
York City Office of Management and Budget said that the city’s pre-
September 11 revenue forecast adequately accounted for the general 
economic slowdown under way at the time of the attacks, and, therefore, 
the estimates of tax losses do not materially overstate the effect of 
the terrorist attacks. In addition, the New York State Division of 
Budget agreed that the estimated tax revenue losses for fiscal year 
2003 are uncertain, but that nearly half of the estimated loss already 
occurred, at the start of the fiscal year in April, and the loss was 
related to the terrorist attacks but not other events. 

As of June 2002, the federal government has authorized funds of about 
$10.4 billion to New York to partly compensate for the economic losses 
attributable to the attacks, [Footnote 5] including up to $6.4 billion 
for debris removal and temporary housing assistance. Nonetheless, the 
specific amount of funding obligated solely to New York City has not 
yet been compiled. In addition, under the federally administered 
Community Disaster Loan program, loans can be issued to local 
governments to help them replace lost tax revenues. However, the 
program has a maximum loan amount of $5 million and states are not 
eligible for assistance from this program. 

Background: 

Last year’s slowdown in the national economy and the economic fallout 
from the terrorist attacks reduced the tax revenues that many states 
had anticipated at the start of the fiscal year. For example, at least 
40 states had insufficient revenues to meet planned expenditures for 
fiscal year 2002, according to a recent report by the governors and 
state budget officers associations. [Footnote 6] New York City was 
especially hard hit in 2001, losing about 124,000 private sector 
jobs—including about 83,000 from September through the end of the 
year—and the tax revenues that the jobs would have generated. [Footnote 
7] In addition, visits by business travelers and tourists decreased 
after September 11, 2001, lowering sales and related tax revenues. 
Moreover, buildings that were destroyed or damaged by the terrorist 
attacks will yield lower property-related tax revenues in 2003 and 
beyond. 

As we indicated in our May 2002 report, [Footnote 8] some of the 
economic costs of the attacks would be covered by emergency federal 
relief funds. [Footnote 9] As of June 2002, the federal government has 
authorized funds of about $10.4 billion to New York to compensate, in 
part, for the losses attributable to the attacks. [Footnote 10] For 
example, up to $6.4 billion was authorized for New York, through the 
Federal Emergency Management Agency (FEMA), for debris removal, 
temporary housing assistance, and related activities. However, the 
specific amount of funding obligated solely to New York City has not
yet been compiled. In addition to the direct federal assistance, under 
the Community Disaster Loan program administered by FEMA, loans can be 
issued to local governments to help them replace tax revenue losses. 
However, the program has a maximum loan amount of $5 million and states 
are not eligible for assistance from this program. 

New York Budget Offices Attribute Estimates of Revenue Losses through 
2003 to Terrorist Attacks: 

Both the New York City Office of Management and Budget and the New York 
State Division of Budget estimated that the September 11 terrorist 
attacks would reduce anticipated tax revenues for fiscal years 2002 and 
2003. For example, as of July 2002, the city budget office estimated 
that the terrorist attacks would reduce tax revenues by about $1.6 
billion in 2002 and $1.4 billion in 2003, for a total revenue loss of $3
billion. [Footnote 11] Of the total estimated loss for both fiscal 
years combined, about $915 million was from reduced personal income tax 
revenues, $901 million from reduced business tax revenues, and $700 
million from reduced sales tax revenues. Similarly, as of June 2002, 
the state budget office estimated that the terrorist attacks would 
reduce the state’s tax revenues by about $1.6 billion in 2002 and $4.2 
billion in 2003, for a total loss of $5.8 billion. [Footnote 12] Of the 
total estimated loss for both fiscal years combined, about $4.9 billion 
is a result of lower-than-anticipated revenues from personal income 
taxes. 

In developing estimates of revenue losses, the city and state budget 
offices used standard methods for forecasting tax revenues. For 
example, the budget offices used econometric models to forecast 
employment and wages in important sectors in the New York economy (for 
example, in finance, real estate, and insurance). [Footnote 13] For 
these models, the key inputs include a forecast of economic activity at 
the national level (for example, U.S. gross domestic product). The 
forecasts of employment and wages are then used with other data, 
including tax rates, to develop forecasts of anticipated tax revenues. 

For tax revenues, both budget offices compared a pre-September 11 
baseline revenue forecast with one revised post-September 11 in order 
to disentangle the effects of the terrorist attacks from other possible 
factors. The revision was updated to reflect changes in the economy and 
tax revenues collected since the terrorist attacks. For example, the 
New York City budget office compared a baseline revenue forecast for 
August 2001, reflecting economic conditions and anticipated tax 
revenues, with a revised forecast for June 2002, updating changes in 
the economy since the attacks. According to city budget officials, the 
baseline forecast reflected the economic slowdown that was already 
under way at the time of the attacks. For instance, the August baseline 
assumed that local private-sector employment would remain unchanged in 
2001 compared with the fiscal year 2002 budget (adopted June 2001) that 
assumed a 1 percent increase. Based on these and other assumptions, the
budget office estimated that but for the terrorist attacks, tax 
revenues would have been about $23.4 billion in fiscal year 2002 and 
$24.5 billion in fiscal year 2003. [Footnote 14] By contrast, according 
to the revised June 2002 budget forecast, tax revenues would fall to 
about $21.8 billion in fiscal year 2002 and $23.1 billion in fiscal 
year 2003 because of the worsening economy since the terrorist attacks. 
Based on a comparison of the baseline and revised revenue forecasts, 
the city budget office concluded that the reduction in tax revenues was 
due to the terrorist attacks. 

Similarly, the New York State budget office compared a baseline revenue 
forecast, reflecting an outlook of the economy for September 10, 2001, 
with a revised forecast for May 2002, reflecting changes in both 
economic conditions and tax revenues collected since the attacks. 
According to state budget office officials, the baseline used 
conservative assumptions to reflect an economy that was already 
weakening at the time of the terrorist attacks. For example, the 
baseline forecast assumed that the national economy would grow by only 
0.7 percent in 2001 and 2.1 percent in 2002. In addition, the budget 
office incorporated into the baseline forecast the personal income 
taxes that had been collected (that is, from withholdings) since the 
start of the fiscal year in April 2001. Based on these and other 
assumptions, the baseline forecast projected that but for the terrorist 
attacks, the state’s tax revenues would be about $38.7 billion in 
fiscal year 2002 and $40.5 billion in fiscal year 2003. By contrast, 
actual tax collections through the end of the state’s 2002 fiscal year 
(March 31, 2002) were about $37.1 billion. In addition, the state 
budget office’s revised forecast estimated that tax revenues would fall 
to about $36.3 billion for fiscal year 2003. Based on a comparison of 
the revenues anticipated in the baseline with actual revenues received 
in 2002 and those expected for 2003, the state budget office concluded 
that the fall in tax revenues was a result of the terrorist attacks. 

New York Budget Offices’ Estimates May Include Revenue Losses Unrelated 
to Terrorist Attacks: 

Even though the budget offices used standard forecasting methods to 
develop their estimates, the estimates have some limitations. 
Specifically, the budget offices assumed that for the estimated tax 
revenue, the entire difference between the preattack baseline and the 
revised revenue forecasts was a result of the terrorist attacks. 
However, precisely measuring the effect of the terrorist attacks on 
economic activity and tax revenues is inherently difficult because the 
effect of the terrorist attacks must be disentangled from the effect of 
other events. This task is made especially difficult because both the 
national and New York economies were slowing at the time of the 
terrorist attacks. Consequently, other factors may also have 
contributed to the post-September 11 decline in New York’s tax 
revenues. For example, as mentioned earlier, the city budget office 
used a baseline forecast that represented an outlook of the economy in 
August 2001. Nonetheless, the economic outlook in September, developed 
before the attacks, indicated several important measures of economic
activity had weakened since August. [Footnote 15] For instance, the 
September forecast assumed that U.S. gross domestic product would 
increase by 2.4 percent in 2002 instead of the 2.6 percent projected in 
August. Similarly, the September forecast projected that U.S. 
employment would grow by only 0.4 percent in 2002, compared with the 
1.1 percent increase in August, and that the S&P 500 Stock Index (a 
measure of financial activity) would decline by about 2 additional 
percentage points in 2001, compared with the projection in August. 

In addition, the Securities Industry Association reported, some of the 
estimated 15,500 securities jobs lost in the month following the 
terrorist attacks were a result of downsizing that had taken place 
before the attacks. [Footnote 16] According to an official with the
Securities Industry Association, although a large number of the job 
losses were the result of previous downsizing, it is not possible to 
separate out the number of jobs lost through the terrorist attacks from 
the jobs lost through downsizing. But both budget offices’ estimates of 
revenue losses are based on changes in the economy, including 
employment, which occurred between the baseline and the revised tax 
revenue forecasts. The estimated tax revenues losses would therefore 
include the effects of other employment losses, even though these 
losses may have been unrelated to the attacks. Among the federal, 
state, and local government officials with whom we spoke, some said 
that the tax revenue losses of the amounts suggested by the city and 
state may be reasonable, even though the estimates may also include the 
effects of other factors, such as the economic slowdown. 

Moreover, because the baseline forecasts are projections based on a 
point in time (August and September 10, 2001), they do not net out 
other events that occurred after the terrorist attacks, which may also 
have affected economic activity. For example, the economic fallout from 
the collapse of Enron and subsequent accounting firm improprieties may 
have dampened financial market activity and gains in personal and 
business incomes. However, since these events occurred after the 
attacks and before the budget offices revised their revenue forecasts, 
any effect on economic activity would be included in the revenue losses 
that were attributed to the terrorist attacks. 

Furthermore, the effects of the attacks on tax revenues for fiscal year 
2003 are more uncertain than those for 2002. This uncertainty is a 
result of factors yet to be determined, such as the degree to which the 
attacks have made New York City a less attractive location for 
businesses and the extent to which those jobs that have been lost to 
date are permanently lost. For example, TenantWise recently projected 
that of the roughly 138,000 jobs estimated to have been displaced by 
the destruction of the World Trade Center and damage to surrounding 
buildings, about 18,000 are expected to be relocated to New Jersey over 
the next year. [Footnote 17] Since some of the relocations have not yet 
occurred, there is some uncertainty about the impact on New York’s tax
revenues. And additional relocations may occur if businesses that are 
currently based in New York City decide to further decentralize their 
operations, moving to other areas of New York or the region, to 
minimize the potential impact of a possible future attack. 
Nevertheless, although business and job relocations to other states
would reduce New York's economic activity, increases in activity in 
other states and communities would help to offset New York's losses in 
the national economy. 

Finally, the estimate of tax revenue losses for fiscal year 2003 also 
depend on the ability of the econometric models to accurately project 
the effect of the terrorist attacks on the New York economy. However, 
since the terrorist attacks were unprecedented and historical data are 
used in the models as the basis for forecasting changes in the economy, 
the extent to which the models have accurately measured the effect of 
the terrorist attacks is unclear. [Footnote 18] 

According to an official with the city’s budget office, the August 
baseline forecast adequately accounted for the economic slowdown at the 
time of the attacks. In particular, the official said, the economic 
outlook for September 2001 did not show any major deterioration in the 
economy compared with the economic outlook in August and some measures 
of the economy (such as consumption and investment) had been revised 
upward. In addition, as to the possible effect of the Enron collapse 
and subsequent accounting firm improprieties on estimated tax revenues, 
the official said, the August forecast adequately accounted for the 
decline in Wall Street profits for 2001; the major cumulative impact of 
accounting firm improprieties and corporate earnings restatements had 
only recently occurred and therefore had only a minor effect on the 
city’s tax collections for fiscal year 2002. 

Nonetheless, as discussed earlier, the economic outlook in September 
did indicate that several important economic measures declined since 
August, suggesting the city’s estimate of reduced tax revenues includes 
some effect of a slowing economy. In addition, because the August 
forecast could not have taken into account events that occurred 
subsequently, such as the collapse of Enron and accounting firm 
improprieties, any effect these events had on economic activity would 
be reflected in the city’s estimate of reduced tax revenues. 

According to an official with the state’s budget office, since the 
baseline forecast was developed 5 months into the 2002 fiscal year, it 
incorporates several months of tax revenue collections (for example, 
personal income tax withholdings), which enhances the accuracy of the 
forecast for the remainder of the fiscal year. In addition, the 
baseline forecast included an estimate of the job losses that were a 
result of downsizing in the securities industry. Moreover, the official 
said, although the state econometric models may be less likely to 
accurately measure the effects of an unprecedented event like the 
terrorist attacks, the models were supplemented with the views of 
industry experts; this enabled the budget office to better understand 
the potential effect of the attacks. 

Nevertheless, distinguishing between the economic effects of the 
terrorist attacks versus those of a slowing economy is inherently 
difficult. For example, as mentioned above, there is no possible way to 
separate out the number of jobs lost as a result of the terrorist 
attacks from the jobs lost as a result of downsizing. In addition, 
although supplementing the models with expert opinion is an important 
component of forecasting economic activity, it does not eliminate the 
uncertainty associated with the estimates of the economic effects of 
the terrorist attacks on New York’s tax revenues. 

Agency Comments: 

We obtained comments via electronic mail on a draft of this report from 
the two budget offices. The Deputy Director of the New York City Office 
of Management and Budget said the pre-September 11 revenue forecast 
adequately accounted for the general economic slowdown under way at the 
time of the attacks and, therefore, the estimates of tax losses do not 
materially overstate the effect of the terrorist attacks. The Chief 
Budget Examiner for the New York State Division of Budget agreed that
the estimated tax revenue losses for fiscal year 2003 are uncertain, 
but nearly half of the estimated loss for 2003 had already occurred in 
April, at the start of the fiscal year; the loss was related to the 
terrorist attacks, but not other events. 

In addition to these comments, the budget offices provided a number of 
technical comments. We incorporated these comments where appropriate. 

As agreed with your offices, unless you publicly announce this report’s 
contents earlier, we plan no further distribution until 7 days from the 
report date. At that time, we will send copies to interested 
congressional committees. This report is also available at no cost on 
the GAO Web site at [hyperlink, http://www.gao.gov]. 

If you have any questions or would like to discuss this report further, 
I can be reached at (202) 512-2700. Major contributors to this report 
include Scott Farrow, Tim Guinane, Laurel Rabin, Kathleen Scholl, and 
Mark Stover. 

Signed by: 

Nancy R. Kingsbury: 

Managing Director, Applied Research and Methods: 

List of Congressional Requesters: 

The Honorable Maurice Hinchey: 
House of Representatives: 

The Honorable Steve Israel: 
House of Representatives: 

The Honorable John LaFalce: 
House of Representatives: 

The Honorable Nita Lowey: 
House of Representatives: 

The Honorable Carolyn Maloney: 
House of Representatives: 

The Honorable Jerrold Nadler: 
House of Representatives: 

The Honorable Charles Rangel: 
House of Representatives: 

The Honorable Jose Serrano: 
House of Representatives: 

[End of correspondence] 

Footnotes: 

[1] U.S. General Accounting Office, Review of Studies of the Economic 
Impact of the September 11, 2001, Terrorist Attacks on the World Trade 
Center, GAO-02-700R (Washington, D.C.: May 29, 2002). 

[2] New York City’s fiscal year is from July through June, and New York 
State’s fiscal year is from April through March. 

[3] The Fiscal Policy Institute is a nonprofit research and education 
organization that focuses on New York tax, budget, and economic issues. 

[4] DRI-WEFA is a consulting firm that analyzes and forecasts economic 
activity in the U.S. and world markets. 

[5] In addition to these authorized funds, the Liberty Zone economic 
stimulus package was passed in March 2002, providing $5 billion in 
business tax credits. In late July, the House and Senate passed an 
emergency supplemental appropriations for fiscal year 2002 that 
includes an additional $5.5 billion for assistance to New York. 

[6] National Governors Association and National Association of State 
Budget Officers, The Fiscal Survey of States (Washington, D.C.: May 
2002). 

[7] Seasonally adjusted data. New York City Office of the Comptroller, 
Economic Notes, (New York: May 2002). 

[8] GAO-02-700R. 

[9] As we indicated in our May 2002 report, several studies of the 
economic costs of the terrorist attacks measured costs in terms of 
gross income losses. Consequently, these cost estimates also include 
income-related tax revenue losses. 

[10] See footnote 5. 

[11] In a May 23, 2002, letter to the Federal Emergency Management 
Agency, the New York City Deputy Mayor stated $650 million of the total 
revenue loss estimate was needed to compensate for immediate needs, 
including $220 million for lost property and related tax revenues, $281 
million for lost business income tax revenues, and $149 million for 
lost tax revenues associated with reduced hotel occupancies. 

[12] According to a state official, depending on factors such as the 
pace of the national economic recovery, the total loss estimate could 
be as low as $4.6 billion or as high as $9 billion. 

[13] An econometric model uses historical data and statistical analysis 
to quantify the relationship between economic variables, such as the 
demand for employment and gross domestic product. This model serves as 
the basis for forecasting future changes in employment. 

[14] The city budget office’s estimates of tax revenue losses include 
some adjustments for changes in tax policy that occurred after the 
terrorist attacks. We included the adjustments in the city’s baseline 
revenue estimates. 

[15] Based on DRI-WEFA’s monthly U.S. Economic Outlook for August and 
September 2001. 

[16] Securities Industry Association, Research Reports (New York: April 
10, 2002). Although the jobs were lost before the attacks, the former 
employees remained on company payrolls until severance payments 
expired. 

[17] TenantWise is a commercial real estate business in New York. See 
TenantWise, Special Report: Overview of Current Situation (New York: 
July 2002) and this Web site: [hyperlink, http://www.tenantwise.com] 
(downloaded July 7, 2002). 

[18] Because the terrorist attacks were unprecedented, the accuracy of 
the budget offices’ past forecasts may be less useful as a guide in 
assessing the potential performance of the forecast of the revenue 
impacts of the attacks. 

[End of section] 

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