Are there economies of scale to data in internet search? This paper is first to use real search engine query logs to empirically investigate how data drives the quality of internet search results. We find evidence that the quality of search results improve with more data on previous searches....

Are there economies of scale to data in internet search? This paper is first to use real search engine query logs to empirically investigate how data drives the quality of internet search results. We find evidence that the quality of search results improve with more data on previous searches....

Recommender systems are effectively used to provide users with suggestions based on their preferences, and first showed their value in e-commerce sites like Amazon and eBay that algorithmically provided recommendations. A key drawback with these systems is that some items need “personal...