Building Bridges and Widening Gaps
利用丹麦和瑞典之间厄勒海峡大桥开通的自然实验，研究发现大桥使瑞典跨境通勤大幅增加，区域平均工资提高13.5%，但高学历男性获益最大，低学历女性获益最小，加剧了收入不平等和性别工资差距。
Abstract By exploiting the opening of the Öresund Bridge between Denmark and Sweden, we examine the impact of access to larger labor markets on wages and employment. We show that the bridge generated a substantial increase in the cross-country commuting behavior of Swedes and a 13.5% increase in the average wage of workers in the region. We further show that the wage gains are unevenly distributed: the effect is largest for high-educated men and smallest for low-educated women. Thus, the wage gains come at the cost of increased income inequality and a widening of the gender wage gap, both within and across households.