Technical note

Technical Note

Labor Productivity: The industry labor productivity measures describe the relationship between 
industry output and the labor time involved in its production. They show the changes from period to 
period in the amount of goods and services produced per hour. Although the labor productivity measures 
relate output to hours of all persons in an industry, they do not measure the specific contribution of labor 
or any other factor of production. Rather, they reflect the joint effects of many influences, including 
changes in technology; capital investment; utilization of capacity, energy, and materials; the use of 
purchased services inputs, including contract employment services; the organization of production; 
managerial skill; and the characteristics and effort of the workforce.

Output: Industry output is measured as an annual-weighted index of the changes in the various products 
or services (in real terms) provided for sale outside the industry. Real industry output is usually derived 
by deflating nominal sales or values of production using BLS price indexes, but for some industries it is 
measured by physical quantities of output. 

Industry output measures are constructed primarily using data from the economic censuses and annual 
surveys of the U.S. Census Bureau, U.S. Department of Commerce, together with information on price 
changes primarily from BLS. Other data sources include the Energy Information Administration, U.S. 
Department of Energy; the Bureau of Transportation Statistics, U.S. Department of Transportation; the 
U.S. Geological Survey, U.S. Department of the Interior; the U.S. Postal Service; the Postal Rate 
Commission; and the Federal Deposit Insurance Corporation.

Labor Hours: The primary source of industry employment and hours data is the BLS Current 
Employment Statistics (CES) survey. The CES provides monthly data on the number of total and 
nonsupervisory worker jobs held by wage and salary workers in nonfarm establishments, as well as data 
on the average weekly hours of nonsupervisory workers in those establishments. CES data are 
supplemented with data from the Current Population Survey (CPS) to estimate employment and hours 
of self-employed and unpaid family workers in each industry. Data from the CPS, together with CES 
data, are also used to estimate the historical average weekly hours of supervisory workers for each 
industry. CES and CPS data are supplemented or further disaggregated for some industries using data 
from the BLS Quarterly Census of Employment and Wages (QCEW), the Census Bureau, or other 
sources. Other sources of employment and hours data for some service industries include the Association 
of American Railroads, the U.S. Department of Transportation, and the U.S. Postal Service. Hours of all 
persons in an industry are treated as homogeneous and are directly aggregated.  

Unit Labor Costs: Unit labor costs represent the cost of labor required to produce one unit of output. 
The unit labor cost indexes are computed by dividing an index of industry labor compensation by an 
index of real industry output. Unit labor costs also describe the relationship between compensation per 
hour and real output per hour (labor productivity). Increases in hourly compensation increase unit labor 
costs; increases in labor productivity offset compensation increases and lower unit labor costs. 
Labor Compensation: Labor compensation, defined as payroll plus supplemental payments, is a 
measure of the cost to the employer of securing the services of labor. Payroll includes salaries, wages, 
commissions, dismissal pay, bonuses, vacation and sick leave pay, and compensation in kind. 
Supplemental payments include legally required expenditures and payments for voluntary programs. The 
legally required portion consists primarily of Federal old age and survivors’ insurance, unemployment 
compensation, and workers’ compensation. Payments for voluntary programs include all programs not 
specifically required by legislation, such as the employer portion of private health insurance and pension 

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Last Modified Date: May 29, 2013