Bachelor of Arts University Texas, Arlington, 1966. Master of Arts Southern Methodist University, Texas, 1968. Master of Science, Doctor of Philosophy N. Carolina State University, 1970, 1972.
Research Association National Bureau of Economie Research, New York, New York, United States of America, New York, Stanford, California, 1972-1977. Visiting Professor, Graduate Center City University, New York, 1972-1974. Visiting Scholar, United States Department Labor, 1976-1977.
Senior Economics, Rand Corporation, Santa Monica, California, United States of America, Adjunct Association Professor of Economics, University Southern California, since 1977. Association Editor, Annals Economics and Social Measurement, 1974-1978.
Early work concentrated on models of human capital investment and the use of panel or longitudinal data for the analysis of earnings determination. These works developed the notion of individual differences in lifetime wage patterns and the implications of poverty dynamics and labour supply. Subsequent research focussed on the effects of local labour market conditions over time and on the effects of this on earnings.
Contributions to applied microeconometric modelling include research on energy demand, time-of-day pricing of electricity, legal decision-making, dispute resolution in medical malpractice cases, educational investments in developing countries, the demand for medical care, the efficacy of preventive medical care, and academic promotion of scientists.