In many two-sided markets we observe that there is a common distributor on one side of the market. One example is the TV industry, where TV channels choose advertising prices to maximize own profi…t and typically delegate determination of viewer prices to independent distributors. We show that...

Farrell and Shapiro proposed a simple test of the possible upward pricing pressure (UPP) following a merger. They showed that the test may give false negatives, that is, indicate that a merger may not give an UPP, while a more comprehensive test would indicate the opposite. We show that their...

This study develops and uses a successive oligopoly model, with an unobservable non-linear tariff between upstream and downstream firms, to analyze the possible anti-competitive effects of an upstream merger. We nd that an upstream merger may lead to higher average prices paid by downstream...

This paper deals with the enforcement of merger policy, and aims to study how merger emedies affect the deterrence accomplished by controlling mergers. We determine the optimal frequency of investigations launched by the agency, and identify situations where the introduction of remedies can lead...

A common approach to merger simulations used in antitrust cases is to calibrate demand from market shares and a few additional parameters. When the products involved in the merger case are differentiated along several dimensions, the resulting diversion ratios may be very different from those...