Compustat - Wrds

library(RPostgres) library(DBI)

: The author thanks WRDS support for documentation and sample queries. wrds compustat

The CRSP/Compustat Merged (CCM) table ( ccm.ccmxpf_linktable ) provides link history between gvkey and permno (CRSP permanent number). 000 active and 31

: This is the primary resource for historical and current data on U.S. and Canadian public companies. It includes annual and quarterly data for over 24,000 active and 31,000 inactive companies. 000 inactive companies.