Miller (2014, 2017) proposes an approach to the analysis of merger effects in markets involving procurement where one of the two product lines is discontinued. This note proves that, as presented in Miller (2014, 2017) and applied to a number of actual merger cases, eliminating one of the two...

I propose a framework in which asymmetric multi-product retailers compete for one-stop shoppers who have biased beliefs about their future purchase probabilities (and so make unplanned purchases). One firm carries a full portfolio of products while the other carries an incomplete but endogenous...

Nearly half of all transactions in the $5 trillion market for manufactured goods in the United States were intermediated by wholesalers in 2012, up from 32 percent in 1992. Seventy percent of this increase is due to the growth of "superstar" firms - the largest one percent of wholesalers....

Although the pricing dynamics of hardcore cartels have been studied intensively from a theoretical perspective, empirical evidence is still rare. We combine publicly available data with a unique private data set of about 340,000 market transactions from 36 smaller and larger customers of German...

Collusion among bidders is a recurring problem in both public and private procurements. This is evident from recent U.S. enforcement actions and those of other jurisdictions across the globe targeting bid-rigging cartels and resulting in substantial fines, civil damages, and terms of...

In an effort to increase competition and decrease price, the Global Fund to Fight AIDS, Tuberculosis and Malaria recently began asking some grant recipients to use international competitive bidding processes for certain drug purchases. Unfortunately, for countries like Kenya, this request has...