Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Dollars, Not Seasonally Adjusted

Frequency:  Monthly

Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1942-1955. Data For 1935 Through January, 1943 Were Computed By Adding Data On The Western Union And Postal Telegraph Companies. Prior To 1934, Data Are From The Mackay Companies. 1920-1942 Data Refer To Net Operating Income; Thereafter, Data Refer To Net Operating Revenues. See The Second Segment For Net Operating Revenues Beginning January, 1943 (Back Data From 1942); Net Operating Income Discontinued Following Adoption Of New Accounting Methods. Source: Survey Of Current Business, For 1920-1922; Survey Of Current Business Supplements 1932 And 1936 And Following Monthly Issues For 1923-1934 Data; Thereafter, Data Furnished By The Federal Communications Commission, Operating Data From Monthly Reports Of Telegraph Carriers.

This NBER data series m09004a appears on the NBER website in Chapter 9 at http://www.nber.org/databases/macrohistory/contents/chapter09.html.

NBER Indicator: m09004a