Associate Professor: Population & Health Geography, University of Leeds

Emeritus Professor of Economics, University of Florida

Consulting demographer

Harvard University, University of California San Francisco

Center for Demographic, Urban and Environmental Studies, El Colegio de México

Charles University, Prague

Universitas Muhammadiyah Kalimantan Timur

Associated Professor, Warsaw School of Economics

Universidade Estadual de Campinas

University of Texas at San Antonio