Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Number of Concerns, Not Seasonally Adjusted

Frequency:  Monthly

Quarterly Data Were Computed From Given Cumulative Quarterly Totals. Beginning In 1893 Monthly Data Are Given Except That Through 1908, The Months Of March, June, And September Are Here Computed From Quarterly Totals, Subtracting The Preceding Two Months. Source: Bradstreet'S, A Journal Of Trade, Finance, And Public Economy

This NBER data series m09028 appears on the NBER website in Chapter 9 at http://www.nber.org/databases/macrohistory/contents/chapter09.html.

NBER Indicator: m09028