IT and Urban Polarization
研究发现，自1990年代以来，不同城市间信息技术投资的差异是导致就业和工资极化的关键因素。通过新数据集和模型估计，揭示了IT价格下降如何扩大常规与非常规认知工作的工资差距，并推动就业结构转变。
We show that differential IT investment across cities has been a key driver of job and wage polarization since the 1990s. Using a novel dataset, we establish two stylized facts: IT investment is highest in firms in large and expensive cities, and the decline in routine cognitive occupations is most prevalent in large and expensive cities. We propose and estimate a model and find that the fall in IT prices helps explain the wage gap between routine and nonroutine cognitive jobs, as well as the shift in employment away from routine cognitive toward nonroutine cognitive jobs.