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Technical Note
Gross Domestic Product
Third Quarter of 2010 (Advance Estimate)
October 29, 2010
This technical note provides background information about the source data and estimating methods used to
produce the estimates presented in the GDP news release.  The complete set of estimates for the third
quarter is available on BEA's Web site at www.bea.gov; a brief summary of "highlights" is also posted on the
Web site.  In a few weeks, the estimates will be published in BEA's monthly journal, the Survey of Current
Business, along with a more detailed analysis of the estimates ("GDP and the Economy").

Real GDP

Real GDP increased 2.0 percent (annual rate) in the third quarter of 2010, following an increase of 1.7
percent in the second quarter.  The small acceleration in real GDP in the third quarter reflected a
deceleration in imports and accelerations in inventory investment and in consumer spending that were
partly offset by a downturn in residential fixed investment and decelerations in nonresidential fixed
investment and in exports.

Source data for the advance estimate

The advance GDP estimate for the third quarter of 2010 is based on source data that are incomplete and
subject to revision.  Three months of source data were available for consumer spending on goods;
shipments of capital equipment other than aircraft; motor vehicle sales and inventories; manufacturing
durables inventories; federal government outlays; and consumer, producer, and international prices.
Only two months of data were available for most other key data sources; BEA’s assumptions for the third
month are shown in table A.  Among those assumptions are the following:

*	an increase in nondurable manufacturing inventories,
*	an increase in non-motor-vehicle merchant wholesale and retail
*	a decrease in exports of goods, excluding gold, and
*	a decrease in imports of goods, excluding gold.


The price index for gross domestic purchases increased 0.8 percent in the third quarter, following an
increase of 0.1 percent in the second.  Excluding food and energy, the price index for gross domestic
purchases increased 0.6 percent in the third quarter, following an increase of 0.8 percent in the second.

American Recovery and Reinvestment Act of 2009

BEA's national accounts reflect the effects of the federal outlays and tax cuts included in the American
Recovery and Reinvestment Act of 2009.  Most of the effects of ARRA on GDP show up indirectly through the
effects on GDP components such as consumer spending, residential investment, and state and local government
spending.  Thus, BEA’s accounts do not directly identify the portion of GDP expenditures that is funded by
ARRA.  It is possible, however, to identify the effects of ARRA on selected federal government transactions
(see table B).

During the third quarter of 2010, ARRA provisions lowered personal taxes about $120 billion (annual rate)
and raised government social benefits to persons about $60 billion, thus raising disposable personal income
(income after taxes) about $180 billion.  In addition, ARRA funded about $101 billion in current grants to
state and local governments (such as Medicaid and education grants), about $42 billion in capital transfers
to state and local governments, to home buyers, and to businesses, about $27 billion in federal consumption
expenditures and gross investment, and about $3 billion in subsidies for housing and energy.  Further
information, including quarterly estimates of the effects of ARRA beginning with 2009, is available at

Brent R. Moulton
Associate Director for National Economic Accounts
Bureau of Economic Analysis
(202) 606-9606