Construction
    Productivity: Output per hour of all persons, by industry /1


          Construction
          ------------
    1977         22.65
    1978         20.92
    1979         20.23
    1980         19.76
    1981         18.66
    1982         17.48
    1983         17.98
    1984         18.72
    1985         19.22
    1986         19.44
    1987         19.20
    1988         18.94
    1989         18.81
    1990         18.46
    1991         18.35
    1992         18.88
    1993         18.56
    1994         19.03

    /1 Output is chained 1992 dollar gross product originating by industry
    published by the Bureau of Economic Analysis (BEA) in Table 14 (page 154) of
    the August 1996.  Hours of all persons are constructed by assuming that
    self-employed workers work the same number of hours annually as full-time
    employees.  Annual hours of full-time employees are constructed by dividing
    hours worked by full-time and part-time employees by the number of
    full-time-equivalent employees.  Self-employed workers are constructed by
    subtracting full-time-equivalent employees from persons engaged in
    production.  See Tables 6.5c, 6.8c, 6.9c in the National Income and Product
    Accounts.  Data for 1987 to 1994 are reported using 1987 SIC definitions;
    data for 1977 to 1986 are reported using 1972 SIC definitions.  Productivity
    levels in the earlier period are adjusted by setting the 1987 levels of
    productivity equal for the two definitions.  Where the two sets of SIC codes
    were not comparable, we followed BEAs instructions and merged series.  These
    are indicated by footnotes.  Finally, there are some series breaks for the
    number of self-employed workers in the two-digit industries between 1991 and
    1992.