Here is an interesting study of social networks in Canada http://www.statcan.gc.ca/daily-quotidien/090626/dq090626a-eng.htm available in pdf or html French or English http://www.statcan.gc.ca/pub/11-008-x/11-008-x2009002-eng.htm Peter Timusk statistical computer programmer ptimusk@sympatico.ca address 701-151 Parkdale Avenue Ottawa, Ontario Canada K1Y 4V8 Phone 613-729-8328 May all your numbers be quality numbers... even if they are only average numbers.