Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Locomotives, Not Seasonally Adjusted

Frequency:  Monthly

Series Is Presented Here As Two Variables--(1)--Original Data, 1921-1937 (2)--Original Data, 1937-1943 Data Include Switching And Terminal Companies. Data For January 1937 Computed By NBER By Dividing December 1936 Plus January 1937 Figures By Two. Source: Interstate Commerce Commission, Motive Power And Car Equipment Of Class I Steam Railways.

This NBER data series m01257b appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: m01257b