Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Thousands of Days, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Data For 1921-1932 Include Switching And Terminal Companies; Thereafter These Areas Are Not Covered. Source: Interstate Commerce Commission, Wage Statistics, Statement M-300.

This NBER data series m08177 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.

NBER Indicator: m08177