Regional inequality in the U.S.: Evidence from city‐level purchasing power
利用1990-2015年42种产品的季度数据，发现美国城市间购买力差异大且持续扩大，且全要素生产率冲击可预测这种区域不平等的上升。
Abstract Using quarterly data for 42 products over the period from 1990 to 2015, we find that there has been a large and growing dispersion of purchasing power across U.S. cities since 1990 and the dispersion varies widely across products. We also find that total factor productivity shock precedes or predicts the rise in regional inequality of purchasing power. We view that the growing regional inequality found in the purchasing power among U.S. cities might have proceeded after nationwide productivity shocks mainly by the cities with higher share of skilled workers through the products with more flexible price adjustments.