Release: NBER Macrohistory Database
Content: Class I Railways. Includes Class I Switching And Terminal Companies Nov. 1910 Through Dec. 1931. Increase In Wages June 1918 And July-Aug. 1920. Source: 1907-09: Interstate Commerce Commission, "Bulletin Of Operating Revenues And Expenses Of Steam Roads, " #5, P.12, #18, P.12, #31. 1910-21:"Statistics Of Railways, " 1921, P.C; 1922-43: "Operating Revenues And Expenses Of Class I Steam Roads, " Monthly.
This NBER data series m02084b appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: m02084b
National Bureau of Economic Research, Railroad Expenditures on Maintenance of Ways and Structures for United States [M02H4BUSM398NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M02H4BUSM398NNBR, November 23, 2017.