Thanks for your message. I am out of town and will be back in my office on August 26; I will probably be out of email contact until then. I will get back to you as soon as possible after that. Thanks again for your message. Adrian Raftery ------------------------------------------------------------------- Adrian E. Raftery Professor of Statistics and Sociology Director, Center for Statistics and the Social Sciences University of Washington, Box 354320 Phone: (206) 543-4505 Seattle, WA 98195-4320. FAX: (206) 221-6873 Web: www.stat.washington.edu/raftery; www.csss.washington.edu