The Gains from Market Integration
综述了关于产品市场整合（即降低空间贸易壁垒）收益的最新研究，涵盖国际和国内贸易两个层面。
How large are the gains from product market integration—or, equivalently, from a reduction in barriers to trade over space? This article surveys recent work on this question in the context of both international and intranational trade.