When I took my own advice, and ReRTFS, I realized that the heavy user cutoff point was one hour (as someone posted), and not two. Also, what none of us noted, is their three-way categorizing problably underestimates heavy user effects -- if it had been 2 or 4 hours/day instead of 1. (remember this is home use). There are also boundary problems inevitable with an categorizing scheme (as compared to regression): 59 minutes equals lite use, while 61 minutes equals heavy use. Apologies and goodnite. Hope to see some of you at the ASAs in Montreal next week, especially the CITASA section (Comm & Info Tech). Please say Hi. Barry _____________________________________________________________________ Barry Wellman Professor of Sociology NetLab Director wellman at chass.utoronto.ca http://www.chass.utoronto.ca/~wellman Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto Canada M5S 2G8 fax:+1-416-978-7162 You're invited to visit & contribute to the new version of "Updating Cybertimes: It's Time to Bring Our Culture into Cyberspace" http://chass.utoronto.ca/oldnew/cybertimes.php _____________________________________________________________________