1. . 1999. The geography of medicare. The American Economic Review, Papers and Proceedings of the One Hundred Eleventh Annual Meeting of the American Economic Association, vol. LXXXIX, New York, NY, 228–233.
2. , . 2001. Area differences in the utilization of medical care and mortality among the US elderly. Paper Presented at the National Bureau of Economic Research Conference on Aging, May.
3. Basic Econometrics. McGraw Hill: Boston, MA.
4. City Size Effects, Trends, and Policies
5. 1976b. Production functions and supply applications for California Dairy Farms. Monograph 36, Giannini Foundation, University of California: Berkeley, July 152 pp.