Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Number of Locomotives, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Switching And Terminal Companies Are Excluded Through 1936. They Were Included Beginning In 1937. The Figure For January 1937 Was Derived By Adding The 12/1936 Figure (Excluding The Companies) And The 01/1937 Figure (Including Them) And Dividing By Two. Source: Computed By NBER By Adding Series (Locomotives Assigned To Freight And Passenger Service, Respectively).

This NBER data series m01273 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: m01273