We study the effects of Jamuna Bridge in Bangladesh that reduced the average trade costs by 50% and connected 26 million people by road to the capital city. We use a difference-in-difference design where the isolated Padma hinterland constitutes the comparison. Balance tests for an array of economic characteristics support the parallel trends assumption. The bridge led to economic revival in the Jamuna hinterland with increased agricultural productivity and population density despite a decline in the share of manufacturing employment. The effects are spatially heterogeneous with substantial manufacturing decline in the middle subregion, and the remote areas reaping the highest benefits.

中文翻译：

---

过渡到大推还是反洗？孟加拉贾木纳大桥的市场整合、再分配和生产力效应

我们研究了孟加拉国贾木纳大桥的影响，该大桥将平均贸易成本降低了 50%，并将 2600 万人通过公路连接到首都。我们使用差异中的差异设计，其中孤立的 Padma 腹地构成了比较。一系列经济特征的平衡测试支持平行趋势假设。尽管制造业就业份额下降，这座桥导致贾穆纳腹地的经济复苏，农业生产力和人口密度增加。这些影响在空间上是异质的，中部次区域的制造业大幅下降，而偏远地区的收益最高。