Costas is a Research Fellow of the Institute. He is also Professor of Economics at Yale University and Visiting Professor at University College London. His research interests are Econometrics, Public policy, Labor economics, Economics of education, Microeconometrics, Evaluation of public policy, Household behavior, Retirement and pensions, Income distribution, Consumption, Demand analysis, Investment and Development economics.
Education
PhD Economics, University of Manchester, 1985
MA (with Distinction) Economics, University of Manchester, 1980
BA (1st Class Honours) Economics and Econometrics, University of Manchester, 1979
The availability of household-level data covering long periods of time makes it relatively easy to assess likely sources of aggregation bias. In this paper, the authors illustrate a promising methodology, which requires computing aggregation factors across households. If these factors are stable over time, aggregate data can be used to estimate micro-parameters.
