1. Population pressures and agricultural development in developing countries: A conceptual framework and recent evidence
2. 1992. Rural Population Dynamics and Agricultural Development: Issues and Consequences Observed in Latin America. Cornell University Population and Development Program and the Cornell International Institute for Food, Agriculture and Development: New York.
3. 1993. Population, Land Use and the Environment in Developing Countries: What Can We Learn From Cross-National Data? The Population Association of America Annual Meeting, Cincinnati, 1-3 April.
4. 1994. Population change and agricultural intensification in developing countries. In Population and Environment: Rethinking the Debate, (eds). Westview Press: Boulder, CO; 171-207.