Michael Bacharach (1936-2002) was Professor of Economics at the University of Oxford, where he was also Director of the Bounded Rationality in Economic Behavior Research Unit. His books included the present work, which he was completing at the time of his death, and "Economics and the Theory of Games." Natalie Gold is a Postdoctoral Fellow in the Philosophy, Probability, and Modeling Group at the University of Konstanz. Robert Sugden, Professor of Economics at the University of East Anglia, Norwich, is the author of "The Economics of Rights, Cooperation and Welfare" and the co-author of "The P...