Why Has Urban Inequality Increased?
研究了1980至2007年间大城市工资不平等加剧的机制，发现资本与技能的互补性以及集聚经济的技能偏向变化解释了至少80%的不平等加剧。
This paper examines mechanisms driving the more rapid increases in wage inequality in larger cities between 1980 and 2007. Production function estimates indicate strong evidence of capital–skill complementarity and increases in the skill bias of agglomeration economies in the context of rapid skill-biased technical change. Immigration shocks are the source of identifying variation across cities in changes to the relative supply of skilled versus unskilled labor. Estimates indicate that changes in the factor biases of agglomeration economies rationalize at least 80 percent of the more rapid increases in wage inequality in larger cities.