1. Department of Criminology, Law, and Society; University of California; 3331 Social Ecology II 92697-7080 Irvine CA USA
2. Department of Sociology, Institute for Mathematical and Behavioral Sciences; University of California; Irvine CA USA
3. Department of Geography; University of Tennessee; Knoxville TN USA
4. Department of Sociology, School of Statistics, Minnesota Population Center; University of Minnesota; Minneapolis MN USA