Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Percent of Normal, Seasonally Adjusted

Frequency:  Monthly

This Series Has Been Adjusted For Trend As Well As For Seasonal Variation. Source: 1884-1918 Data Are From "Index Of Business Activity In The Pittsburgh District, 1884-1936, " A Leaflet Prepared By The Bureau Of Business Research, University Of Pittsburgh; 1919-1953 Data Are From The Pittsburgh Business Review, June 30, 1943, P. 13; December 1948, P. 3, And Monthly Issues Thereafter.

This NBER data series m12009aa appears on the NBER website in Chapter 12 at http://www.nber.org/databases/macrohistory/contents/chapter12.html.

NBER Indicator: m12009aa