NAICS_TO_FF: Stata module to convert NAICS codes to Fama-French industry classifications

Kelvin K. F. Law

Statistical Software Components from Boston College Department of Economics

Abstract: baics_to_ff converts NAICS codes to Fama-French industry classifications. The command supports all major Fama-French industry classification schemes: FF5, FF10, FF12, FF17, FF30, FF38, FF48, and FF49. The command accepts both numeric and string NAICS codes. String NAICS codes are automatically converted to numeric values. Non-numeric strings (e.g., "XXXX") are treated as missing. The Fama-French industry classifications are widely used in empirical accounting and finance research to group firms by industry. These classifications are based on four-digit SIC codes and are maintained by Kenneth R. French on his data library website.

Language: Stata
Requires: Stata version 14 and sic_to_ff from SSC (q.v.)
Keywords: data management; NAICS codes; SIC codes; Fama; French (search for similar items in EconPapers)
Date: 2025-12-21
Note: This module should be installed from within Stata by typing "ssc install naics_to_ff". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/n/naics_to_ff.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/n/naics_to_ff.sthlp help file (text/plain)

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