Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Index Jan 1923=100, Not Seasonally Adjusted

Frequency:  Monthly

The Index Was Computed By NBER From Figures Showing The Percentage Changes Between Successive Months For Changing Groups Of Identical Firms. Source: Computed By NBER From Figures Supplied By The Federal Reserve Bank Of Chicago (1923-1937 Data) And The U.S. Department Of Commerce (1938)

This NBER data series m06047 appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.

NBER Indicator: m06047