1. Department of Sociology, Louisiana State University, Baton Rouge, Louisiana 70803, USA; fax: +1 225 388 5102;
2. Department of Sociology, Anthropology and Social Work, Edinboro University of Pennsylvania, 107 Hendricks Hall, Edinboro, Pennsylvania 16444, USA; fax: +1 814 453 4714;
3. 2075 Beacon Street, Newton, Massachusetts 02468, USA;