1. Department of Sociology and Anthropology, The University of Texas at El Paso, El Paso, TX 79968
2. Department of Mathematical Sciences, The University of Texas at El Paso, El Paso, TX 79968
3. Department of Urban Studies, Worcester State University, Worcester, MA 01602
4. Sociology Department, The University of California at Merced, Merced, CA 95343
5. Sociology Department, University of Utah, Salt Lake City, UT 84112
6. Geography Department, University of Utah, Salt Lake City, UT 84112