Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Number of Locomotives, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Data Refer To "Steam" Only For 08/1918-12/1919, But From 1920-1924 "Electric" Amounted To Less Than 1% Of The Total Steam And Electric. From 1920 On, Data Are Computed By NBER By Adding "Steam" And "Electric". Source: 1918-1919 Data Are From Federal Reserve Bulletins Of February 1919, P. 162 And February 1920, P. 183; 1920-1930 Data Are From U.S. Bureau Of The Census, "Railroad Locomotives" (Mimeograph Release), December 1931; 1931-1934 Data Are From Ibid, December Issues; Following Years Are From Other Issues Of "Railroad Locomotives" And Survey Of Current Business, Annual Supplements.

This NBER data series m01148 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: m01148