Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Percent of Norm, Not Seasonally Adjusted

Frequency:  Monthly

Source: Rorty, Harvard Business Review, January, 1923, P. 159, For 1877-1898; For 1899 And Following Years, See "Industrial Activity As Related To Long Term Growth Percentage Deviations, " American Telephone And Telegraph Company.

This NBER data series m12002a appears on the NBER website in Chapter 12 at http://www.nber.org/databases/macrohistory/contents/chapter12.html.

NBER Indicator: m12002a