Weekly estimates of unemployment use the number of persons filing new claims for unemployment insurance (UI) benefits. Much more accurate data is based on large scale interview surveys, and is reported on the first Friday of the following month. Since 1940 the monthly Current Population Survey (CPS) has been used. <ref>See [http://www.bls.gov/cps/cps_htgm.htm Bureau of Labor Statistics]</ref> | Weekly estimates of unemployment use the number of persons filing new claims for unemployment insurance (UI) benefits. Much more accurate data is based on large scale interview surveys, and is reported on the first Friday of the following month. Since 1940 the monthly Current Population Survey (CPS) has been used. <ref>See [http://www.bls.gov/cps/cps_htgm.htm Bureau of Labor Statistics]</ref> |