1880-1887 Data Are Based On 15 Private Car Works. 1888 Data Based On 43 Car Works. 1889 Data Based On 36 Carworks. Figures For 1890-1891 Were Based On Data For 50 Private Car Works. That Of 1892 On 48; That Of 1893 On 43 Companies; That Of 1894 On 27; And That Of 1895-1896 On 40. Beginning In 1897, Figures Are Based On Data For 30 Contracting Carworks And Estimates From 5 Others. 1905-1911 Data Include Canadian Output. 1912-1938 Figures Include Canadian Output Plus Equipment Built In Railroad Shops. Some Figures For Canadian Production Are Available Separately In The Source. Source: 1880-1898 Data Are From Railway Gazette; 1899-1933 Data Are From Railway Age, January 27, 1934, P. 161; 1934-1938 Data Are From Railway Age, January 7, 1939, P. 76.
This NBER data series a01153 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01153
Release: NBER Macrohistory Database
National Bureau of Economic Research, Freight Cars Built, Total for United States [A01153USA472NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A01153USA472NNBR/, June 3, 2015.