Population Movements in the Presence of Agglomeration and Congestion Effects: Local Policy and the Social Optimum
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We investigate the efficiency properties of population mobility when localities compete in an environment with local amenities and local externalities. Our model is dynamic, incorporating land and labor markets in a context where firms and workers form rational expectations. Concern focuses on whether and under what conditions the substantive conclusions from static models can be reinterpreted to apply in a dynamic context where moving is costly. In the spirit of Tiebout (1956), it can be shown in static models that taxes or subsidies developed by each local jurisdiction representing the interests of landowners can induce an efficient population allocation even in the presence of local externalities. We show that, in a dynamic model, efficiency of mobility requires that localities represent the interests of other local stakeholders, including residents and firms, as well as landowners. There may be multiple sets of equilibrium flows corresponding with alternative expectations. We consider institutional arrangements that may facilitate preferred paths.
Department of Economics, 2009
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