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Index
An Introduction to Decision Theory
Title page
Copyright page
Contents
Preface
1 Introduction
1.1 Normative and descriptive decision theory
1.2 Rational and right decisions
1.3 Risk, ignorance and uncertainty
1.4 Social choice theory and game theory
1.5 A very brief history of decision theory
2 The decision matrix
2.1 States
2.2 Outcomes
2.3 Acts
2.4 Rival formalisations
3 Decisions under ignorance
3.1 Dominance
3.2 Maximin and leximin
3.3 Maximax and the optimism–pessimism rule
3.4 Minimax regret
3.5 The principle of insufficient reason
3.6 Randomised acts
4 Decisions under risk
4.1 Maximising what?
4.2 Why is it rational to maximise expected utility?
4.3 The axiomatic approach
4.4 Allais’ paradox
4.5 Ellsberg’s paradox
4.6 The St Petersburg paradox
4.7 The two-envelope paradox
5 Utility
5.1 How to construct an ordinal scale
5.2 von Neumann and Morgenstern’s interval scale
5.3 Can utility be measured on a ratio scale?
5.4 Can we define utility without being able to measure it?
6 The mathematics of probability
6.1 The probability calculus
6.2 Conditional probability
6.3 Bayes’ theorem
6.4 The problem of unknown priors
7 The philosophy of probability
7.1 The classical interpretation
7.2 The frequency interpretation
7.3 The propensity interpretation
7.4 Logical and epistemic interpretations
7.5 Subjective probability
8 Why should we accept the preference axioms?
8.1 Must a rational preference be transitive?
8.2 Must a rational preference be complete?
8.3 The multi-attribute approach
8.4 Must a rational preference satisfy the independence axiom?
8.5 Risk aversion
9 Causal vs. evidential decision theory
9.1 Newcomb’s problem
9.2 Causal decision theory
9.3 Evidential decision theory
10 Bayesian vs. non-Bayesian decision theory
10.1 What is Bayesianism?
10.2 Arguments for and against Bayesianism
10.3 Non-Bayesian approaches
11 Game theory I: Basic concepts and zero-sum games
11.1 The prisoner’s dilemma
11.2 A taxonomy of games
11.3 Common knowledge and dominance reasoning
11.4 Two-person zero-sum games
11.5 Mixed strategies and the minimax theorem
12 Game theory II: Nonzero-sum and cooperative games
12.1 The Nash equilibrium
12.2 The battle of the sexes and chicken
12.3 The bargaining problem
12.4 Iterated games
12.5 Game theory and evolution
12.6 Game theory and ethics
13 Social choice theory
13.1 The social choice problem
13.2 Arrow’s impossibility theorem
13.3 Sen on liberalism and the Pareto principle
13.4 Harsanyi’s utilitarian theorems
14 Overview of descriptive decision theory
14.1 Observed violations of the expected utility principle
14.2 Prospect theory
14.3 Violations of transitivity and completeness
14.4 The relevance of descriptive decision theory
Appendix A: Glossary
Appendix B: Proof of the von Neumann–Morgenstern theorem
Further reading
Index
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