1987-1996 National Health Interview Survey More recent nhis is available for downloading at http://www.cdc.gov/nchs/data_access/ftpdata.htm http://www.cdc.gov/nchs/about/major/nhis/quest_data_related_doc.htm (1997 & 1998) And 1993 data available through the FERRET data extraction tool at: http://www.cdc.gov/nchs/datawh/ferret/ferret.htm jroth@nber.org Jean Roth 12/04/2000