pan91hdr.doc last update Nov. 20, 1994 Bronwyn H. Hall =========================================================== This file describes the dataset pan91hdr.dat. The dataset contains the header info for all the firms in the 1991 R&D-manufacturing sector panel. The variables are the following (Compustat names in parentheses): cusip sic 87/91 srce smbl cname 6-digit cusip number (CNUM). 4-digit sic from Compustat (DNUM). ='bo' if on both 87 and 91 files; ='en' if firm entered during 88-91. ='ind' or 'otc'; followed by 'r'(esearch) or 'a'(nnual). Stock market ticker symbol (SMBL). Compustat name of firm (CNAME). In SAS notation, the format of each record is the following: (6.0 +1 4.0 +1 $2. +1 $3. +1 $1. +1 $5. +1 $28.)