Sources of Wage Inequality
利用瑞典的雇主-雇员匹配数据，检验了关于工资不平等的典型事实，发现大部分工资不平等来自行业-职业内部和相似特征的工人之间，但瑞典企业间工资差异的贡献较小，可能源于集体工资协议的影响。
Recent theories of firm heterogeneity emphasize between-firm wage differences as a new mechanism through which trade can affect wage inequality. Using linked employer-employee data for Sweden, we show that many of the stylized facts about wage inequality found in Helpman et al. (2012) for Brazil also hold for Sweden. Much of overall wage inequality arises within sector-occupations and for workers with similar observable characteristics. One notable difference is a smaller contribution from between-firm differences in wages in Sweden, which could reflect the influence of Swedish labor market institutions in dampening the scope for variation in wages between firms through collective wage agreements.