Fuzzy Choice Functions: A Revealed Preference Approach

A main topic in welfare economics is the rational behaviour of a consumer when, faced with various prices and incomes, he has to make a choice. The theory of consumption establishes the framework in which the rationality of consumers is defined and the principle on which it is based. By [109], “the rationality of a consumer may be described by postulating that a consumer has a definite preference over all conceivable commodity bundles and that he chooses those commodity bundles that are opt...