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Social choice theory or social choice is a branch of welfare economics that analyzes mechanisms and procedures for collective decision-making.[1] Social choice incorporate insights from economics, mathematics, and game theory to find the best ways to combine individual opinions, preferences, or beliefs into a single coherent measure of the quality of different outcomes, called a social welfare function.[2]
Whereas decision theory is concerned with individuals making choices based on their preferences, social choice theory is concerned with groups making choices based on the preferences of individuals. A non-theoretical example of a collective decision is enacting a law or set of laws under a constitution. Another example is voting, where individual preferences over candidates are collected to elect a person that best represents the group's preferences.[3]
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