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Firm Characteristics

Features of the firms or companies under study

A classification of a group of companies that are related in terms of their primary business activities. CLEAR classifies industries by their 2017 North American Industry Classification System (NAICS) codes, though industry definitions can vary by study. Other categories will be added as they are studied.

NAICS code 23

NAICS code 51

NAICS codes 31–33

The number of employees in a firm

A business that is limited in size and revenue. The definition varies by industry.