Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Thousands of Cars, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Series Is Preseted Here As Two Variables--(1)--Original Data, 1907-1917, (2)--Original Data, 1915-1944. The Railroads Included In These Data Are The Same Throughout, Except That The Actual Number Of Roads Decreased Due To Consolidations, From About 175 To 118. The Figures Throughout, However, Are Comparable. Data Are The Average Of Bi-Weekly Statistics. Source: American Railway Association, "Unfilled Car Requisitions", Bulletin No. 6, August 17, 1917; Quarterly Journal Of Economics, Vol. 33, P. 179.

This NBER data series m03009a appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03009a