The digital revolution has dramatically reduced search costs for information. Consumers can now access information that …

Paid placement, where advertisers bid payments to a search engine to have their products appear next to keyword search … learn about a seller?s product through a costly search. In equilibrium, a seller bids more for placement when his product is … more relevant for a given keyword, and the paid placement of sellers by the search engine reveals information about the …

assortments. Consumers face a search problem within an assortment of horizontally differentiated products supplied by a monopolist …. They may search for a product match by drawing products from the assortment or by seeking word of mouth recommendations …

show that the increase in efficiency holds even when controlling for the search intensity of guests, the change in the … composition of transactions and aggregate market conditions at the time of search I demonstrate that guests are elastic with …

Sponsored search mechanisms, where advertisers bid for placement to be as close to the top in the listing of search … results, are the fastest growing among online search models. Sponsored search in popular search services such as Google and … Yahoo! employ an auction mechanism wherein firms can bid, for a better placement in the (sponsored) search results, on …