Diskussionsbeiträge des Fachbereichs Wirtschaftswissenschaft ; 2006/14 : Volkswirtschaftliche Reihe
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This paper investigates the impact of changes in national border demarcation on economic integration. It treats the national breakups in Central Europe due to WWI as a natural experiment, which allows for evaluating the particular effect of new national borders. A gravity model of trade is used to analyze goods-specific trade among Central European regions. The main results are, first, that the treatment effect of new borders is large. Second, decomposing the border effect provides evidence of a “border before border” for parts of Germany that became separated even before WWI. Third, the analysis indicates a high level of economic integration before WWI among Polish regions that became politically unified only after the war.
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