Economics Insights @ CBS

We study consumers' click behavior on organic and sponsored links after a keyword search at an Internet search engine. Using a dataset of individual-level click activity after keyword searches from a leading search engine in Korea, we find that consumers' click activity after a keyword search is quite low and is heavily concentrated on the organic list. However, searches of less popular keywords (i.e., keywords with lower search volume) are associated with more clicks per search and a larger fraction of sponsored clicks.

Substitution decisions have been examined from a variety of perspectives. The economics literature measures cross-price elasticity, operations research models optimal assortments, the psychology literature studies goals in conflict, and marketing research has examined substitution-in-use, brand switching, stockouts, and self-control. We integrate these perspectives into a common framework for understanding consumer substitution decisions; their specific drivers (availability of new alternatives, internal vs.

We examine changes in banks' market-to-book ratios over the last decade, focusing on the dramatic and persistent declines witnessed during the financial crisis. The extent of the decline and its persistence cannot be explained by the delayed recognition of losses on existing financial instruments. Rather, it is declines in the values of intangibles — including customer relationships and other intangibles related to business opportunities — along with unrecognized contingent obligations that account for most of the persistent decline in market-to-book ratios.