Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Number of Firms, Not Seasonally Adjusted

Frequency:  Quarterly

Notes:

Series Is Presented Here As Two Variables--(1)--Original Data, 1895-1920 (2)--Original Data, 1919-1954. Source: Ralph L. Nelson, The Merger Movement In American Industry (NBER), An Unpublished Manuscript

This NBER data series q10093a appears on the NBER website in Chapter 10 at http://www.nber.org/databases/macrohistory/contents/chapter10.html.

NBER Indicator: q10093a