Information Frictions, Internet, and the Relationship between Distance and Trade
利用挪威宽带推广项目的外生变化，研究发现宽带使贸易对距离和经济规模更敏感，因为降低信息摩擦扩大了贸易伙伴选择，使需求对贸易成本弹性更大。
We examine how the adoption of information communication technology affects bilateral trade. The context is a public program in Norway that rolled out broadband access points leading to plausibly exogenous variation in the availability and adoption of broadband by firms. We find that broadband makes trade patterns more sensitive to distance and economic size. These results are consistent with a model of trade with variable elasticity of demand. The model predicts that adoption of a technology that lowers information frictions enlarges the choice set of exporters and importers. This makes demand more elastic with respect to trade costs and thus distance.