Diego Penarrubia

• University of Murcia

In a two-sector economy, we consider the endogenous determination of the level of competition in the imperfectly competitive sector, under democratic, non-manipulated voting. In the context of the Salop’s (1979) circular model, we identify conditions such that in addition to a competitive equilibrium (with most voters choosing the efficient level o...

Motivated by the fact that some regulations involve extra costs for those firms at a size beyond a critical threshold, this paper contributes to the analysis of the welfare distortions due to these regulations. In the context of a duopoly, our results show that social welfare is not monotonic with the regulatory threshold. In particular, we obtain...

This paper analyzes the optimal antitrust policy in the context of a patent race. In a simplified model, we identify the conditions under which allowing cooperation yields greater welfare than imposing competition. In view of our results, we discuss, critically, the current European policy towards R&D cooperation.

We consider the interactions between innovation and merger policy under di erent assumptions on technology transfer. In the absence of licencing, we show that in some cases the government must commit to a permissive policy to ensure that socially desirable innovations take place, while in other cases it must commit to a prohibitive policy to deter...

En este trabajo se analizan los efectos de los procesos de integración comercial y financiera sobre la concentración empresarial, especialmente en el sector bancario español. Se obtiene que las fusiones se encauzan de manera distinta según la actividad productiva, la naturaleza de los bienes que se intercambian y la forma con que compiten las empre...

In this work we develop a spatial model to explain local megers and acquisitions (M&As) in European retail banking systems as strategic reactions to changes in regulation and economic integration. We show that local banking concentration increases market power and contributes to build new barriers to entry. Local M&As yield positive social results...

Many economic booms have been accompanied by real exchange rate appreciations, large trade defcits -which have sometimes persisted after the return to the initial exchange rate parity- and a deteriorating traded sector. Those circumstances have typically raised the question of the de-sirability of some stabilization policy. We show that the dynamic...