Gravity with Gravitas: A Solution to the Border Puzzle
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The gravity model has been widely used to infer substantial trade flow effects of institutions such as customs unions and exchange rate mechanisms. McCallum [1995] found that the US-Canada border led to trade between provinces that is a factor 22 (2,200%) times trade between states and provinces, a
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美国国家经济研究局创建时间：
2001-01-01
