Release: NBER Macrohistory Database
Data Include Depreciation Source: Computed By NBER By Dividing Series 03040 (Railway Operating Expenses, Total) By "Traffic Units" (From NBER Files)
This NBER data series m03065 appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.
NBER Indicator: m03065
National Bureau of Economic Research, Railway Operating Expenses Per Traffic Unit for United States [M03065USM259SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M03065USM259SNBR, August 23, 2017.