This paper investigates whether larger quantities of historical data confer a competitive advantage to firms that offer Internet search. We study how the length of time that search engines retained their server logs affected the apparent accuracy of subsequent searches. Our analysis exploits...

This paper investigates whether larger quantities of historical data affect a firm's ability to maintain market share in Internet search. We study whether the length of time that search engines retained their server logs affected the apparent accuracy of subsequent searches. Our analysis...

We explore substitution patterns across advertising platforms. Using data on the advertising prices paid by lawyers for 139 Google search terms in 195 locations, we exploit a natural experiment in “ambulance-chaser” regulations across states. When lawyers cannot contact clients by mail,...