Price matching in online retail
研究美国NewEgg在线零售商的价格匹配保证对价格的影响，发现采用该政策后自身价格上升4.7%，而竞争对手价格不受影响，且效果集中在高评级、高可见度、昂贵的产品上。
Abstract We analyze a sample of consumer‐electronics products sold by the US NewEgg online‐retailer to study the impact of price‐matching guarantees (PMGs) on prices. By applying a difference‐in‐differences approach, we find that the price of the policy‐adopting retailer increases by 4.7% during the policy validity period and up to 5 days after the treatment, while those of the non‐adopting competitor are not affected. Results are mainly driven by highly‐rated, visible, and expensive products, whereas the policy does not affect low‐rated, less visible, and cheaper products. These findings are consistent with the hypotheses that PMGs act as price discrimination or signaling tools.