The Geography of Development: Evaluating Migration Restrictions and Coastal Flooding / Klaus Desmet, Dávid Krisztián Nagy, Esteban Rossi-Hansberg.

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Desmet, Klaus

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Material type: Text

TextSeries: Working Paper Series (National Bureau of Economic Research) ; no. w21087.Publication details: Cambridge, Mass. National Bureau of Economic Research 2015.Description: 1 online resource: illustrations (black and white)Subject(s):

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Abstract: We study the relationship between geography and growth. To do so, we first develop a dynamic spatial growth theory with realistic geography. We characterize the model and its balanced growth path and propose a methodology to analyze equilibria with different levels of migration frictions. We bring the model to the data for the whole world economy at a 1°×1° geographic resolution. We then use the model to quantify the gains from relaxing migration restrictions as well as to describe the evolution of the distribution of economic activity in the different migration scenarios. Our results indicate that fully liberalizing migration would increase welfare more than three-fold and would significantly affect the evolution of particular regions in the world. We then use the model to study the effect of a spatial shock. We focus on the example of a rise in the sea level and find that coastal flooding can have an important impact on welfare by changing the geographic-dynamic path of the world economy.

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April 2015.

We study the relationship between geography and growth. To do so, we first develop a dynamic spatial growth theory with realistic geography. We characterize the model and its balanced growth path and propose a methodology to analyze equilibria with different levels of migration frictions. We bring the model to the data for the whole world economy at a 1°×1° geographic resolution. We then use the model to quantify the gains from relaxing migration restrictions as well as to describe the evolution of the distribution of economic activity in the different migration scenarios. Our results indicate that fully liberalizing migration would increase welfare more than three-fold and would significantly affect the evolution of particular regions in the world. We then use the model to study the effect of a spatial shock. We focus on the example of a rise in the sea level and find that coastal flooding can have an important impact on welfare by changing the geographic-dynamic path of the world economy.