Microenterprise and small enterprise development - globally and domestically, including Michigan
International trade and the Michigan economy
Economics of education
Can Web Courses Replace the Classroom in Principles of Microeconomics? (with Byron Brown) , American Economic Review, Volume 92, #2, (May, 2002) pp. 444-449.
The Dynamics of Micro and Small Enterprises in Developing Countries, World Development, Volume 26, No. 1 (January, 1998), pp 61-74.
Small Enterprises and Economic Development: The Dynamics of Micro and Small Enterprises (with Donald C. Mead). London and New York, Routledge Publishing Company, 1999. 125 pp.
Employment and Growth in Small Scale Industry: Empirical Evidence and Policy Assessment from Sierra Leone (with E. Chuta). London: MacMillan Publishing Company, 1985, 180 pp.
Rural Nonfarm Enterprise Dynamics, in Strategies for Stimulating the Growth of the Rural Nonfarm Economy in Developing Countries. Steve Haggblade, Peter Hazell, and Tom Reardon, editors. Baltimore: The Johns Hopkins Press, 2007. pp 99-114.