Dan,
you could go to Paul Allison's site and download his SAS macro.
http://www.ssc.upenn.edu/%7Eallison/#Macros
Schafer also discusses related issues, pp. 112-118.
Steve
-------------------------------------------------------------------
Steve Gregorich
University of California, San Francisco
Department of Medicine
3333 California Street, Suite 335, Box 0856
San Francisco, CA 94143-0856
(FedEx and UPS use zip code 94118)
[email protected]
http://mywebpage.netscape.com/segregorich/index.html
-------------------------------------------------------------------
