Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Passenger-Miles, Not Seasonally Adjusted

Frequency:  Monthly

Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1929 (2)--Original Data, 1929-1943 Source: NBER Derived This Variable By Dividing Series (Revenue Passenger-Miles) By Series (Passenger Train-Miles); Data Are From The Interstate Commerce Commission.

This NBER data series m03052a appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03052a