Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Percent of Normal, Seasonally Adjusted

Frequency:  Quarterly

This Index Is A Mean Of Percentage Deviations From Secular Trends Corrected For Seasonal Variations And Expressed In Units Of Standard Deviations. The Number Of Series Included Rises From Two In 1855-1880, To Six In 1887-1896, And To Seven In 1897-1914. Source: Journal Of The American Statistical Association, March, 1926, P.60.

This NBER data series q12010 appears on the NBER website in Chapter 12 at http://www.nber.org/databases/macrohistory/contents/chapter12.html.

NBER Indicator: q12010