Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Billions of Ton-Miles, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Data In This Series Is Identical To Data In Series "Railroad Freight Ton-Miles, Revenue" For The Years 1907-1914 And 1916-1924. Data May Be Checked With The Following Interstate Commerce Commission Original Sources -- Data For 1918-1922: Statistics Of Railways, 1922; Data For 1920-1934: "Freight And Passenger Service Operating Statistics Of Class I Steam Railways In The United States," A Monthly Publication; Data For 1935-1942: "Freight Train Performance Of Class I Steam Railways In The United States," A Monthly Publication. However, Some Data Have Been Revised By The Scb And Therefore Will Not Always Agree With The Original Source. Source: Data For 1907-1914: American Railway Association, Proceedings, May 1914, Pp. 525Ff.; November 1914, P. 745; Data For 1916-1943: U.S. Department Of Commerce, Survey Of Current Business, December 1923, P. 52; Annual Supplements Of 1932, 1936, 1938, 1940; Following Monthly Issues

This NBER data series m03001 appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03001