1. Demography and Population Studies Programme, Schools of Public Health and Social Sciences, University of the Witwatersrand, Johannesburg, South Africa
2. Department of Population Studies, School of Humanities and Social Sciences, University of Zambia, Lusaka, Zambia
3. Demography Unit, Zambia Statistics Agency, Lusaka, Zambia
4. Department of Geography, University of Nigeria, Nsukka, Nigeria
5. Department of Social Work and Sociology, School of Humanities and Social Sciences, University of Zambia, Lusaka, Zambia