Hey, I know this isn't a programming question and etc., but WRDS support uses so long time to answer me so I post it here as well. I've a problem regarding WRDS data with regards of the exchange codes. To make it short; I've a CRSP file and a Compustat file. Say that one permno/stock has an EXCHCD of 3(CRSP FILE) and HEXCD of 2 (In the CRSP file), which is different from each others - which one of those two should I use? I only want AMEX stocks so that I can merge it later with the Compustat file (Which for that permno has exchange code of 2). 2 = AMEX 3 = NASDAQ
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