This chapter examines recent developments in economic research relating to antitrust,
paying specific attention to research in the areas of collusion and merger enforcement …

I characterise endogenous market structures where leaders have a first‐mover advantage
and entry is endogenous. Leaders are always more aggressive than the followers …

We compile an IO toolkit for aggregative games with positive and normative comparative
statics results for asymmetric oligopoly in the short and long run. We characterize the class …

Most market structures are neither perfectly or monopolistically competitive: they are
characterized by a few large firms that are engaged in strategic interactions in their …

This article investigates the relationship between the Herfindahl–Hirschman Index (HHI) and
welfare in multiple‐leader Stackelberg models. We formulate two long‐run models of free …

We investigate a Cournot model with strategic R&D investments wherein efficient low‐cost
firms compete against less efficient high‐cost firms. We find that an increase in the number …

We investigate a desirable role of public enterprise in mixed oligopoly in free-entry markets.
We compare the following three cases:(a) a public firm produces before private firms (public …

Both M&A and innovation are instruments for growth and competitive advantage. Therefore
they are fundamental to each firm? s competitive strategy. Usually, both instruments have …

The single market is often perceived as the panacea for Europe's economic troubles. It is
believed that completing the single market would boost welfare, stimulate growth and …

In view of the uncertainty over the ability of merging firms to achieve efficiency gains, we
model the post-merger situation as a Cournot oligopoly wherein the outsiders face …