Sources and footnotes for tables

                                      
                                      
SOURCES:  Output data are from the Bureau of Economic Analysis and the Census
Bureau of the U.S. Department of Commerce; the Bureau of Labor Statistics,
U.S. Department of Labor; and the Federal Reserve Board.  Compensation and
hours data are from the Bureau of Labor Statistics and the Bureau of Economic
Analysis.

RELIABILITY:  Productivity and cost measures are regularly revised as more
complete information becomes available.  The measures are first published
within 40 days of the close of the reference period; revisions appear 30 days
later, and second revisions after an additional 60 days.  In the business
sector, the third publication (second revision) of a quarterly index of
output per hour of all persons has differed from the initial value by between
-1.4 and +1.4 index points approximately 95 percent of the time.  This
interval is based on the performance of this measure between the fourth
quarter of 1995 and the first quarter of 2004.
                                      
                                      
                                      
                            Footnotes, Tables 1-6

(1)  Wages and salaries of employees plus employers' contributions for social
     insurance and private benefit plans.  Except for nonfinancial
     corporations, where there are no self-employed, data also include an
     estimate of wages, salaries, and supplemental payments for the self-
     employed.

(2)  The change for recent quarters is based on the Consumer Price Index for
     all urban consumers (CPI-U).  The trend from 1978-2003 is based on the
     Consumer Price Index research series (CPI-U-RS).

(3)  Unit nonlabor payments include profits, consumption of fixed capital,
     taxes on production and imports less subsidies, net interest and
     miscellaneous payments, business current transfer payments, rental
     income of persons, and the current surplus of government enterprises.

(4)  Current dollar output divided by the output index.

(5)  Quarterly changes:  Percent change compounded at annual rate from the
     original data rather than index numbers.  Annual changes:  Percent
     change between annual average levels.

(6)  Unit nonlabor costs include consumption of fixed capital, taxes on
     production and imports less subsidies, net interest and miscellaneous
     payments, and business current transfer payments.

(7)  Total unit costs are the sum of unit labor and nonlabor costs.

(8)  Unit profits include corporate profits before tax with inventory
     valuation and capital consumption adjustments.