Competition and price dispersion: evidence from airline and high-speed rail competition in China
利用京沪高铁开通和温州动车事故两个事件，研究发现竞争加剧时航空公司对价格弹性大的乘客提供更多折扣，导致价格离散上升约48%；竞争减弱时则相反，价格离散下降约55%。
Abstract The introduction of the Beijing–Shanghai high-speed rail (Launch) and the Wenzhou bullet-train collision (Crash) in China provided a unique occasion to study the effect of competition on price dispersion. Results show that price dispersion increased by about 48% after the Launch, as airlines offered greater discounts to price-elastic consumers than to price-inelastic consumers. By contrast, price dispersion decreased by about 55% after the Crash, as airlines raised prices more for price-elastic consumers than for price-inelastic consumers.