I review previous approaches to modelling oligopoly in general equilibrium, and propose a new view which in principle overcomes their deficiencies: modelling firms as large in their own market but small in the economy as a whole. Implementing this approach requires a tractable specification of...

We introduce the concept of cooperative substitutes and complements, and use it to throw light on the conditions for a research joint venture to choose equal levels of R&D by all member firms. We show that the second-order conditions for a symmetric optimum take a particularly simple form,...

Thresholds defined on the level and change in the HHI (Herfindahl-Hirschmann Index) applied to market shares seem to be the main instrument to select notified mergers for investigation in both the EU and US. We question the use of such a selection rule in differentiated products industries. We...

This paper explores the relationship between competition policy, experience of the application of competition policy, the intensity of local competition and the standard of living. Perception data from the World Economic Forum is used to measure the intensity of local competition. Richer and...

In most countries, competition in the telecommunications industry is subject to both sector-specific regulation and more general antitrust policies. At the same time, a process of international market liberalisation is under way in telecommunications which can only be truly effective - and...

Mit dem "more economic approach" wird ein neuer Ansatz in der EU-Fusionskontrolle verfolgt. Die Zielsetzung einer (besseren) ökonomischen Fundierung ist ausdrücklich zu begrüßen. Allerdings zeigt die genauere Analyse, dass faktisch die Rechtssicherheit verringert wird, während die...

With the "more economic approach" the EU is taking a new tack on merger control policy. This is visible not only in the new SIEC prohibition criterion and the criteria for appraising horizontal mergers but also in more recent decision-making practice. Greater legal certainty, on the one hand,...

Die jüngsten Reformen im Europäischen Wettbewerbsrecht geben Anlaß, sich erneut mit Grundsatzfragen der Wettbewerbspolitik zu beschäftigen. Unter Rückgriff auf die moderne Wettbewerbstheorie, die Industrie- und die Neue Institutionenökonomik werden in diesem Paper die Grundlagen eines...

Die jüngsten, einem ?more economic approach? verpflichteten Reformen im europäischen Wettbewerbsrecht geben Anlaß, sich verstärkt mit der ökonomischen Effizienz als Leitbild der Wettbewerbspolitik zu befassen. In diesem Beitrag wird in Übereinstimmung mit der überwiegenden Praxis in der...

The paper develops a four-step framework to detect anticompetitive horizontal mergers. In the first step, an estimate of the impact of the merger on the market price needs to be derived. Subsequent, the second step of the framework has to assess whether such a predicted price increase would be...