Originally published in 1970, this classic study has been recognized for its groundbreaking role in integrating economics and ethics, and for its influence in opening up new areas of research in social choice, including aggregative assessment. It has also had a large influence on international organizations, including the United Nations, notably in its work on human development. The book showed that the “impossibility theorems” in social choice theory—led by the pioneering work of Kenneth Arrow—do not negate the possibility of reasoned and democratic social choice. Sen’s ideas about social choice, welfare economics, inequality, poverty, and human rights have continued to evolve since the book’s first appearance. This expanded edition preserves the text of the original while presenting eleven new chapters of fresh arguments and results. “Expanding on the early work of Condorcet, Pareto, Arrow, and others, Sen provides rigorous mathematical argumentation on the merits of voting mechanisms...For those with graduate training, it will serve as a frequently consulted reference and a necessity on one’s book shelf.” —J. F. O’Connell, Choice

A study of the classical aggregation problems that arise in social choice theory, voting theory, and group decision-making under uncertainty.

The literature on the theory of social choice has grown considerably beyond the few items in existence at the time the first edition of this book appeared in 1951. Some of the new literature has dealt with the technical, mathematical aspects, more with the interpretive. My own thinking has also evolved somewhat, although I remain far from satisfied with present formulations. The exhaustion of the first edition provides a convenient time for a selective and personal stocktaking in the form of an appended commentary entitled, 'Notes on the Theory of Social Choice, 1963, ' containing reflections on the text and its omissions and on some of the more recent literature. This form has seemed more appropriate than a revision of the original text, which has to some extent acquired a life of its own.

When one thinks about how collective decisions are made, voting is the method that comes naturally to mind. But other methods such as random process and consensus are also used. This book explores just what a collective decision is, classifies the methods of making collective decisions, and identifies the advantages and disadvantages of each method. Classification is the prelude to evaluation. What are the characteristics of a method of making collective decisions, the book asks, that permit us to describe a collective decision as good? The second part of the book is detailed exploration of voting: the dimensions in which voting situations differ, the origins and logic of majority rule, the frequency of cycles in voting, the Arrow and Gibbard-Satterthwaite theorems, criteria for ways of cutting through cycles and the application of these criteria to a variety of rules, voting over continuums, proportional representation, and voting rules that take account of intensities of preferences. Relatively unknown methods of voting give voting a much greater potential than is generally recognized. Collective Decisions and Voting is essential reading for everyone with an interest in voting theory and in how public choices might be made.

The study of government policy and public decision-making has experienced a renaissance in recent years as economists and political scientists have come together to form the new field of collective, or public, choice. The Economics of Colletive Choice is a breakthrough text in this field. It is the first to approach the public policy process with a sophisticated understanding of both economics and government and to present these ideas with a grace and accessibility entirely appropriate to undergraduates. Collective choice economics as presented by Professor Stevens is a mix of applied welfare economics and public choice analysis and does not presuppose a knowledge of intermediate microeconomics. Professor Stevens credits both the conservative insight that government intervention is often worse than what it is intended to cure and the liberal view that efficiency and justice are sometimes best served by intervention. This approach allows students to find their own balance between these ideological views. This unique book is designed as a core text for courses on public choice and public policy analysis. It will also find wide use in courses on public administration or public affairs and as a supplementary text in courses on public sector economics and public finance.

Harrie de Swart is a Dutch logician and mathematician with a great and open int- est in applications of logic. After being confronted with Arrow’s Theorem, Harrie became very interested in social choice theory. In 1986 he took the initiative to start up a group of Dutch scientists for the study of social choice theory. This initiative grew out to a research group and a series of colloquia, which were held approximately every month at the University of Tilburg in The Netherlands. The organization of the colloquia was in the hands of Harrie and under his guidance they became more and more internationally known. Many international scholars liked visiting the social choice colloquia in Tilburg and enjoyed giving one or more presentations about their work. They liked Harrie’s kindness and hospitality, and the openness of the group for anything and everything in the eld of social choice. The Social Choice Theory Group started up by Harrie consisted, and still c- sists, of scholars from several disciplines; mostly economics, mathematics, and (mathematical) psychology. It was set up for the study of and discussion about anything that had to do with social choice theory including, and not in the least, the supervision of PhD students in the theory. Members of the group were, among o- ers, Thom Bezembinder (psychologist), Hans Peters (mathematician), Pieter Ruys (economist), Stef Tijs (mathematician and game theorist) and, of course, Harrie de Swart (logician and mathematician).

An examination of the phenomenon of social cooperation failure, even amongst a group of rational individuals.

The study of government policy and public decision-making has experienced a renaissance in recent years as economists and political scientists have come together to form the new field of collective, or public, choice. The Economics of Colletive Choice is a breakthrough text in this field. It is the first to approach the public policy process with a sophisticated understanding of both economics and government and to present these ideas with a grace and accessibility entirely appropriate to undergraduates. Collective choice economics as presented by Professor Stevens is a mix of applied welfare economics and public choice analysis and does not presuppose a knowledge of intermediate microeconomics. Professor Stevens credits both the conservative insight that government intervention is often worse than what it is intended to cure and the liberal view that efficiency and justice are sometimes best served by intervention. This approach allows students to find their own balance between these ideological views. This unique book is designed as a core text for courses on public choice and public policy analysis. It will also find wide use in courses on public administration or public affairs and as a supplementary text in courses on public sector economics and public finance.

A definitive, comprehensive, and analytically sophisticated treatment of the theory of collective preference