If Many Seek, Ye Shall Find: Search Externalities and New Goods
研究了在多种商品的经济中，消费者搜索如何促进消费者与生产者的匹配，从而推动新商品市场形成，并可能提高福利和利润；同时发现更多直接竞争者可能有利于企业，因为更多卖家会鼓励更多消费者搜索。
Consumer search serves productive roles in an economy with multiple goods. In equilibrium, search promotes the sorting of consumers among producers, thereby enabling the market for new goods, and potentially increasing welfare and profits above the benchmark case (an economy with a single good, hence, no search). When competitors are few, additional direct competitors may benefit a firm, as more sellers may encourage more consumers to search. In return, consumer search entices producers of new goods to enter. Neither of these externalities, nor the coordination problems faced by consumers and producers, is appropriately recognized in the literature.