US Unemployment 1910-1960

Data for 1910-1930 from Christina Romer (1986), "Spurious Volatility in Historical Unemployment Data", The Journal of Political Economy, 94(1): 1-37. Data for 1930-1940 from Robert M. Coen (1973). "Labor Force and Unemployment in the 1920's and 1930's: A Re-Examination Based on Postwar Experience", The Review of Economics and Statistics, 55(1): 46-55. Data for 1940-1960 from the US Bureau of Labor Statistics, Employment status of the civilian noninstitutional population, 1940 to date ftp://ftp.bls.gov/pub/special.requests/lf/aat1.txt, retrieved March 6, 2009.