This paper investigates the dynamic relation between callers' socialties and their wireless phone service consumption. We construct a largepair-level panel dataset with information on the number of each pair'scommon contacts, calling activities, prices, and each caller'scharacteristics over a...

Each search term put into a search engine produces a separate set ofresults. Correspondingly, each of the sets of ads displayed alongsidethe results is priced using a separate auction. We investigate how bidsfor these context-based ads depends on the difficulty of making a match.This contrasts...

This paper examines how manager and firm characteristics relate to entrydecisions in US local telephone markets. To do so, it develops astructural econometric model that allows managers to be heterogeneous intheir ability to correctly conjecture competitor behavior. The modeladapts Camerer, Ho,...

We examine the relationship between the adoption of EMR and hospital operating costs. We first identify a puzzle that has been seen in prior studies: Adoption of EMR is associated with a slight cost increase. We draw on the literature on IT and productivity to demonstrate that the average effect...