Download Collective Preference and Choice by Shmuel Nitzan PDF

By Shmuel Nitzan

Collective decision-making is a well-recognized function of our social, political, and financial lives. It levels from the fairly trivial (e.g. the alternative of the subsequent family members motor vehicle) to the globally major (e.g. even if a rustic may still visit war). but, no matter if trivial or globally major, such judgements contain a few tough difficulties. those difficulties come up within the general social selection atmosphere, the place participants vary of their personal tastes. additionally they come up within the commonplace decision-making surroundings, the place contributors proportion an analogous personal tastes, yet range of their decisional functions. The virtue of Collective choice and selection is that it appears at classical aggregation difficulties that come up in 3 heavily similar parts: social selection idea, balloting idea, and staff decision-making below uncertainty. utilizing a sequence of routines and examples, the e-book explains those issues of connection with a few vital contributions to the research of collective decision-making.

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Example text

Clearly, coping with this issue is a major challenge for social choice theory and in fact, for any theory that is concerned with the study of social behavior or with the search for an appropriate method of social choice. A fundamental positive question, that was of major concern to researchers of social choice, is whether social choice, like individual choice, can be rationalized by some reasonable preference relation. The existence of such a relation, and of a social choice function that can be rationalized by this relation, guarantees rational social behavior.

Public Economics d. Voting Theory. It should be noted that problems dealt with are also relevant to Public Choice and Political Economy. r The main part of the book includes nine chapters devoted to problems associated with the aggregation of preferences, decisions and judgments. 1 presents the classification of the problems according to the three criteria applied. It also presents the disciplinary relevance of the problems. 3 The relationship between preferences and choice The assumption that there exists a firm relationship between the preferences of the economic unit and its behavior (choice from the set of the feasible alternatives it faces) is very common in economic theory.

6) Since the aggregation rule satisfies property T, the previous two steps imply that xPz. (7) Note that the members of the almost decisive set D prefer x to z, but no assumption has been made on the preferences of the remaining individuals regarding alternatives x and z. Since the aggregation rule satisfies property IIA, the social preference between these two alternatives is independent of the preferences of the individuals who are members of the set N \ D. In other words, xPz is a consequence of the assumption (xPDz), independent of the preference of the members of N\D regarding alternatives x to z.

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