Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Cents per Ton-Mile, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Series Is Presented Here As Twor Variables--(1)--Original Data, 1907-1925 (2)--Original Data, 1920-1956. Data Were Computed By NBER By Dividing Series 03016B (Freight Operating Revenues, Class I, Excluding Switching And Terminal Companies) By Series 03003 (Revenue Ton-Miles, Class I, Excluding Switching And Terminal Companies); Both Series Are Based On The Interstate Commerce Commission Source. Source: NBER Computed Data From Interstate Commerce Commission, "Revenue Traffic Statistics Of Class I Steam Railways In The United States".

This NBER data series m03003ac appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03003ac