Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Percent of Trend, Seasonally Adjusted

Frequency:  Monthly

Series Is Presented Here As Three Variables--(1)--Seasonally Adjusted Data, 1875-1915 (2)--Seasonally Adjusted Data, 1915-1919 (3)--Seasonally Adjusted Data, 1916-1961. Data Were Computed By NBER From Published Percentage Deviations From Normal. Source: 1875-1914 Data Are From W.M. Persons, Forecasting Business Cycles, (John Wiley, New York, 1931), Pp. 93-143; 1915 Data Are From The Review Of Economic Statistics, April 1923, P. 76

This NBER data series m12004a appears on the NBER website in Chapter 12 at http://www.nber.org/databases/macrohistory/contents/chapter12.html.

NBER Indicator: m12004a