We analyze the optimal dynamic policy of an antitrust authority towards horizontal mergers when merger proposals are endogenous and occur over time. Approving a currently proposed merger will affect the profitability and welfare effects of potential future mergers, the characteristics of which...

Should internet era merger policy differ from industrial era merger policy? Platform ecosystems rely on economies of scale, data-driven economies of scope, high-quality algorithmic systems, and strong network effects that frequently promote winner-take-most markets. Their market dominance has...

We examine the effects of merger and merger policy on a potential entrant’s pre-merger investment incentives. We establish conditions under which the possibility of merger can induce an entrant to inefficiently imitate an incumbent’s product instead of innovating with a more differentiated...

Over the last years, several reports highlighted the market power of very large online platforms that are gatekeeping intermediaries between businesses and consumers, and the difficulty for classic competition policy tools to deal effectively with anti-competitive practices in these platforms....

In this paper, we analyze the impact of mergers of consumer cooperatives on consumers. We build a game-theoretic model of a supply chain where multiple suppliers produce a product to maximize their profits subject to capacity constraints, and multiple consumer cooperatives procure this product...

While Japan is aging rapidly and the local communities in rural areas are struggling to maintain their essential societal function, the Japan Fair Trade Commission (JFTC) has revised the merger guidelines to allow for mergers that create a monopoly. Under the new approach, which the author calls...

This paper is about the interactions between what is traditionally considered trade policy and a narrow but important aspect of competition policy, namely merger policy. We focus on links between merger policies and trade liberalization. We put special emphasis on the topical issue of the role...