This is the Continuous Work History File. I don't know much about this file. We may have some documentation, or not. Dan Feenberg A search of the usual suspects May 16, 2001 did not turn up any documentation. jroth@nber.org nber1% ls -l total 76146 -rw-rw-r-- 1 jroth web 228 Jun 7 06:49 README.TXT -rw-rw-r-- 1 jroth web 38949981 May 18 1999 cwhs.raw.Z nber1%