The random parameters logit model for aggregate data introduced by Berry, Levinsohn, and Pakes (1995) has been a driving force in empirical industrial organization for more than a decade. While these models are identified in theory, identification problems often occur in practice. In this paper...

Berry, Levinsohn, and Pakes (1995) developed an estimator for an equilibium model of differentiated products markets using aggregate data, without assuming the existence of a representative agent, or imposing prior restrictions on elasticities. Their estimator though, was computationally...

In 1968, 23 states barred the self-service sale of gasoline. By 1992, close to 80% of all gasoline sales nationwide were marketed through self-service, and only New Jersey and Oregon continued to ban self-service sales. This paper examines the rise of self-service gasoline and its impact on...

Newspaper Joint Operating Agreements (JOAs) are long term, inflexible contracts between metropolitan daily newspapers in the same market. These contracts maintain two editorial voices while combining all business operations of the two competitors in order to capture many of the scale economies...

Inconsistencies in duration data at the "seams" between surveys make the problem of determining where one spell ends and the next begins impossible to resolve with certainty. In this paper I develop a statistical approach to partitioning data records with inconsistent duration data. The basis of...