Abstract:Schelling [1969, 1971a, 1971b, 1978] presented a microeconomic model showing how an integrated city could unravel to a rather segregated city, notwithstanding relatively mild assumptions concerning the individual agents' preferences, i.e., no agent preferring the resulting segregation. We examine the robustness of Schelling's model, focusing in particular on its driving force: the individual preferences. We show that even if all individual agents have a strict preference for perfect integration, bestresponse dynamics will lead to segregation. What is more, we argue that the onedimensional and two-dimensional versions of Schelling's spatial proximity model are in fact two qualitatively very different models of segregation.J.E.L. classification codes: C72, C73, D62.
Abstract:Schelling [1969, 1971a, 1971b, 1978] presented a microeconomic model showing how an integrated city could unravel to a rather segregated city, notwithstanding relatively mild assumptions concerning the individual agents' preferences, i.e., no agent preferring the resulting segregation. We examine the robustness of Schelling's model, focusing in particular on its driving force: the individual preferences. We show that even if all individual agents have a strict preference for perfect integration, bestresponse dynamics will lead to segregation. What is more, we argue that the onedimensional and two-dimensional versions of Schelling's spatial proximity model are in fact two qualitatively very different models of segregation.J.E.L. classification codes: C72, C73, D62.
It is shown that altruism does not affect the equilibrium provision of public goods although altruism takes the form of unconditional commitment to contribute. The reason is that altruistic contributions completely crowd out selfish voluntary contributions. That is, egoists free ride on altruism. It is also shown that public goods are less likely to be provided in larger groups. The only qualification to our results is when the probability of altruism is so high that it is a dominant strategy for all egoistic players to free ride. In this case, actually, both altruism and the larger group facilitate public good provision.
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