1. Department of Psychology, San Diego State University, San Diego, California 92103;
2. Department of City and Regional Planning, University of California, Berkeley, California 94720;
3. Department of Government and Economics, Claremont McKenna College, Claremont, California 91711;
4. Department of Parks, Recreation, and Tourism Management, North Carolina State University, Raleigh, North Carolina 27695;
5. The Robert Wood Johnson Foundation, Princeton, New Jersey 08543-2316;