Product Quality and Consumer Search
研究了产品质量提升如何影响消费者搜索行为、企业质量投资及市场效率，发现质量提高可能使消费者更挑剔但未必增加搜索产品数量，且市场质量投资可能过多或不足。
An increase in quality shifts up the distribution of match utilities offered by firms and makes consumers pickier. The number of products that consumers inspect does not necessarily increase in quality. Higher search costs may lead to less quality investment, and the equilibrium price may decrease. If the equilibrium is inefficient, it is because of the inadequacy of quality investment. The market level of quality investment is excessive (insufficient) and consumers are too (little) picky from the point of view of welfare maximization if and only if a rise in quality results in consumers inspecting a higher (lower) number of products.