Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Index 1923-1925=100, Seasonally Adjusted

Frequency:  Monthly

Series Is Presented Here As Three Variables--(1)--Seasonally Adjusted Data, 1919-1924 (2)-- Seasonally Adjusted Data, 1923-1942 (3)--Original Data, 1939-1956. This Index Was Discontinued In September 1942, And Was Superceded Superseded By An Index On The Base 1939=100 (Not Comparable To The Earlier One) Which Was In Turn Superseded By A Revised Series Representing The Number Of Production Workers; Indexes Are No Longer Available. The Revised Series, Used As A Substitute For The Index Shown Through September 1942 Is Not Comparable In Coverage, Including Now Aircraft Engine Manufacturing And Captive Foundries Of The Automobile Industry. Source: Federal Reserve Board, Federal Reserve Bulletin, October 1938 (For Data From 1919-1933); October 1939 (For 1934-July 1939 Data); Monthly Issues Thereafter.

This NBER data series m08019b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.

NBER Indicator: m08019b