Daniel M. Hausman is Herbert A. Simon Professor of Philosophy at the University of Wisconsin, Madison. He is the author or editor of seven books, including Causal Asymmetries (1998), Essays on Philosophy and Economic Methodology (1992), The Separate and Inexact Science of Economics (1992), both editions of The Philosophy of Economics: An Anthology (1984, 1994), and the first edition of Economic Analysis and Moral Philosophy (Cambridge Surveys in Economic Literature, 1996, with Michael McPherson), all published by Cambridge University Press. Professor Hausman has worked on issues concerning ethics and economics, foundational questions concerning the nature of rationality, economic methodology, and causation. He is currently investigating questions concerning the relations between health, welfare, and preferences. Michael McPherson, President of the Spencer Foundation in Chicago, Illinois, is past President of Macalester College, St. Paul, Minnesota, and served as Dean of Faculty and Professor of Economics at Williams College. He has been a Fellow of the Institute for Advanced Study in Princeton and Senior Fellow at the Brookings Institution. Jointly with Daniel M. Hausman he founded and edited the Cambridge University Press journal Economics and Philosophy. Dr. McPherson is co-author of five books. His articles have appeared in the Journal for Economic Literature, American Economic Review, Philosophy and Public Affairs, and Ethics. He has served as a trustee at the College Board and the American Council for Education, and is a member of the National Academy of Education.