The labor market data are based on the Current Population Survey (CPS), a monthly survey of approximately 55,000 housing units sponsored jointly by the . Census Bureau and the . Bureau of Labor Statistics. The basic monthly data are one of the . government’s primary sources of labor force statistics in the country; for example, the nation’s monthly unemployment rate is based on the CPS. Most of the series on employment, unemployment and labor force participation utilized the monthly data, as compiled by the . Bureau of Labor Statistics. The information on school enrollment and weekly earnings come from the Merged Outgoing Rotation Group (MORG) extracts of the CPS.