Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1947-1956. This Series May Be Extended Through July 1948, When Nicb Discontinued It Its Compilation Of Payroll Statistics (See The Management Record, October 1948, P. 504). The Bls Data Substituted For This Series Are Not Comparable In Their Industry Coverage. Source: National Industrial Conference Board: For 1920-1936, "Wages, Hours, And Employment In The United States, 1914-1936" (Nicb Studies No. 229, 1936); For 1937, Supplement To Nicb Service Letter, June 1938; For 1938, Nicb Economic Record, March 28, 1940; For 1939-1942, Tables Furnished By Nicb.
This NBER data series m08214a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08214a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Average Actual Hours of Work Per Week, Chemical Manufacturing for United States [M0814AUSM065NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0814AUSM065NNBR/, November 27, 2015.