Cycles and social choice : the true and unabridged story of a most protean paradox

著者

    • Schwartz, Thomas

書誌事項

Cycles and social choice : the true and unabridged story of a most protean paradox

Thomas Schwartz

Cambridge University Press, 2018

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注記

Includes bibliographical references (p. 151-157) and index

内容説明・目次

内容説明

The centuries-old paradox of voting is that majorities sometimes prefer x to y, y to z, and z to x - a cycle. The discovery of the sources and consequences of such cycles, under majority rule and countless other regimes, constitutes much of the mathematical theory of voting and social choice. This book explores the big questions posed by the paradox of voting: positive questions about how to predict outcomes and explain observed stability, and normative questions about how to hold elections, how to take account of preference intensities, the relevance of social welfare to social choice, and challenges to formal 'rationality', individual and social. The overall lesson is that cycles are facts, ubiquitous, and consequential in non-obvious ways, not puzzles to be solved, much less maladies or misfortunes to be avoided or regretted.

目次

  • Introduction
  • 1. Condorcet's two discoveries
  • 2. Incidence of the paradox
  • 3. Social rationality
  • 4. Arrovian cycle theorems
  • 5. Second line of cycle theorems: Condorcet generalizations
  • 6. Top cycles in a fixed feasible set
  • 7. Strategic consequences of cycles
  • 8. Structural consequences of cycles
  • 9. Questions about prediction and explanation
  • 10. Questions about prescription and evaluation.

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