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Dynamic models of residential ségrégation: an analytical solution

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  • Sébastian Grauwin

    (Phys-ENS - Laboratoire de Physique de l'ENS Lyon - CNRS : UMR5672 - École normale supérieure de Lyon - ENS Lyon, IXXI - Institut Rhône-Alpin des systèmes complexes - INRIA - École normale supérieure de Lyon - ENS Lyon - Institut National des Sciences Appliquées de Lyon - Université Claude Bernard - Lyon I - Ecole Normale Supérieure Lettres et Sciences Humaines - Université Joseph Fourier - Grenoble I - CNRS - IRD)

  • Florence Goffette-Nagot

    () (GATE Lyon Saint-Etienne - Groupe d'analyse et de théorie économique - CNRS : UMR5824 - Université Lumière - Lyon II - Ecole Normale Supérieure Lettres et Sciences Humaines)

  • Pablo Jensen

    (Phys-ENS - Laboratoire de Physique de l'ENS Lyon - CNRS : UMR5672 - École normale supérieure de Lyon - ENS Lyon, IXXI - Institut Rhône-Alpin des systèmes complexes - INRIA - École normale supérieure de Lyon - ENS Lyon - Institut National des Sciences Appliquées de Lyon - Université Claude Bernard - Lyon I - Ecole Normale Supérieure Lettres et Sciences Humaines - Université Joseph Fourier - Grenoble I - CNRS - IRD, LET - Laboratoire d'économie des transports - CNRS : UMR5593 - Université Lumière - Lyon II - Ecole Nationale des Travaux Publics de l'Etat)

Abstract

We propose an analytical resolution of Schelling segregation model for a general class of utility functions. Using evolutionary game theory, we provide conditions under which a potential function, which characterizes the global configuration of the city and is maximized in the stationary state, exists. We use this potential function to analyze the outcome of the model for three utility functions corresponding to different degrees of preference for mixed neighborhoods. Schelling original utility function is shown to drive segregation at the expense of collective utility. If agents have a strict preference for mixed neighborhoods but still prefer being in the majority versus in the minority, the model converges to perfectly segregated configurations, which clearly diverge from the social optimum. Departing from earlier literature, these conclusions are based on analytical results. These results pave the way to the analysis of many structures of preferences, for instance those based on empirical findings concerning racial preferences. As a by-product, our analysis builds a bridge between Schelling model and the Duncan and Duncan segregation index.

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Paper provided by HAL in its series Post-Print with number halshs-00502758.

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Date of creation: 2010
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Handle: RePEc:hal:journl:halshs-00502758

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Keywords: Residential segregation ; Schelling ; dynamic model ; potential function ; social preferences;

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  1. Schelling, Thomas C, 1969. "Models of Segregation," American Economic Review, American Economic Association, vol. 59(2), pages 488-93, May.
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