wrds (version 0.0.1)

sic_2digit: Convert SIC codes to 2-digit industry codes

Description

Extracts the first two characters from SIC codes to create broader industry classifications.

Usage

sic_2digit(sic)

Value

A character vector of 2-digit SIC codes.

Arguments

sic

A numeric or character vector of SIC codes.

Details

SIC codes are hierarchical: the first two digits represent major industry groups (e.g., "54" = Retail-Food Stores), while the full 4-digit code provides more specific classifications (e.g., "5412" = Retail-Convenience Stores).

Examples

# Convenience Stores (SIC 5412) -> Retail-Food Stores (54)
sic_2digit(5412)
# [1] "54"

sic_2digit(c(5412, 5400))
# [1] "54" "54"