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 how internet users' perception of control over their personal information affects how likely they are to click on online advertising. The paper uses data from a randomized field experiment that examined the relative effectiveness of personalizing ad copy using posted...