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Technical Note

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                              Technical Note
                           Gross Domestic Product
                       Third Quarter of 2007 (Advance)
                             October 31, 2007


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").  

Source Data for the Advance Estimate
     
The advance GDP estimate for the third quarter of 2007 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:

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

Prices

The price index for gross domestic purchases increased 1.6 percent in the third 
quarter after increasing 3.8 percent in the second.  Excluding food and energy 
prices, the price index for gross domestic purchases increased 1.7 percent after 
increasing 1.5 percent.


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


                          Table A. KEY ASSUMPTIONS FOR THE ADVANCE ESTIMATE OF GDP
                                      FOR THE THIRD QUARTER OF 2007

For many of the key series used to prepare the advance estimate of GDP, including retail sales,
unit automobile and truck sales and inventories, manufacturers' shipments of nondefense
capital goods (other than aircraft), manufacturers' inventories of durable goods, federal defense
spending, and consumer, producer, and international price indexes, actual data are available for all
months of the quarter.

For the key series shown in this table, actual data for the third month of the quarter usually are not
available in time for inclusion in the advance GDP estimate.  BEA makes assumptions for the source
data that are not yet available; assumptions for September 2007 are shown in the last column of the
table.  For most series shown, the data for August are preliminary and subject to further revision.
Occasionally, the data for earlier months are also subject to revision."

All series shown in the table are in billions of dollars, seasonally adjusted at annual rates, and are
published by the Bureau of the Census.

                                                                            2007
                                                    Apr.      May       Jun.      Jul.      Aug.      Sep.*

Private fixed investment:
   Nonresidential structures:
1     Value of new nonresidential
          construction put in place........        336.3     343.3     346.3     345.5     353.4     349.5

   Equipment and software:
2     Manufacturers' shipments of
          complete aircraft.................        39.8      39.1      41.3      42.4      51.7      34.7

   Residential structures:
      Value of new residential
         construction put in place:
3       Single family.......................       326.9     320.3     315.0     308.5     298.1     285.6

4       Multifamily.........................        51.1      50.3      49.7      49.2      49.1      48.5

Change in private inventories:
5   Change in inventories for nondurable
        manufacturing.......................        13.1      22.0      14.1       3.9      -4.7       0.3

5a  Change in inventories for merchant
      wholesale and retail industries other
      than motor vehicles and equipment.....        50.8      44.9      21.5      18.8      -6.8      16.2

Net exports:
   Exports of goods:
 6     U.S. exports of goods,"
          international-transactions-
          accounts basis....................      1091.2    1121.3    1139.5    1183.3    1187.5    1183.1

6a     Excluding gold.......................      1073.4    1107.4    1121.8    1171.4    1170.2    1168.7

   Imports of goods:
 7     U.S. imports of goods,"
          international-transactions-
          accounts basis....................      1899.3    1943.1    1960.1    1996.5    1986.4    2006.2

7a      Excluding gold......................      1886.7    1932.0    1954.6    1984.5    1977.1    1996.0

8   Net exports of goods....................      -808.1    -821.8    -820.6    -813.2    -799.0    -823.1

8a      Excluding gold......................      -813.3    -824.6    -832.8    -813.1    -806.9    -827.3

Government:
   State and local:
      Structures:
9       Value of new construction put
            in place........................       260.3     265.0     265.9     269.4     270.6     270.0
____________
*Assumption.