As stated also in the title of the paper, the analysis proposed is contrary to normative microeconomics. Therefore, we do not intend to analyze the individuals, with the intent to show if they behave correctly or wrongly, economically speaking.Our intention is to follow the logic of the individuals that act in the economic markets, led by their own rationality and the way they manage to became aware of their needs.The purpose of the paper is to determine the necessary degree of rationality so as the expectations of the individuals match the results of their actions in order to fulfill hierarhically their needs. In this matter, we will explain why Sen and Kekes are mistaken when they tie some of needs to products.We will analyze the needs, same as the institutions that pass the test of time and belong firstly to the modern individual. The thing that modifies and can be linked to products is the level of satisfaction and the standard to which these needs are satisfied.
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