Two forces have reshaped global securities markets in the last decade: Exchanges operate at much faster speeds and the trading landscape has become more fragmented. In order to analyze the positive and normative implications of these evolutions, we study a framework that captures (i) exchanges'...

Many governments promote small businesses for the dual reasons of fostering `break-through' innovations and employment growth. In this paper we study the effects of tax and subsidy policies on entrepreneurs' choice of riskiness of an innovation project and on their mode of commercializing the...

This paper studies the impact of financial constraints on the persistency of high markups in a class of markets, including most of public procurement, known by practitioners as bidding markets. We develop an infinite horizon model in which two firms optimally reinvest working capital and bid for...

This paper analyzes the incentives to invest in Next Generation Access Networks (NGA) in a framework with horizontal product differentiation with price competition between an investing and an access seeking firm. Given uncertainty about the success of the NGA, I compare regulatory regimes with...

We extend the monopoly case without congestion in Brueckner (2004) by examining network choice in a duopoly where airport congestion can occur. Airlines prefer hub-and-spoke configurations, even if this implies higher congestion costs. Airlines may be inefficiently biased towards hub-and-spoke...

Here, we study vertical foreclosure in a dynamic setup with learning-by-doing production technologies. There is a downstream monopoly and an upstream duopoly, where manufacturers produce differentiated products and can gain proficiency through the accumulation of their production. We study the...

The welfare effects of vertical integration are ambiguous. Cost efficiencies and the elimination of double marginalization may offset increases in market power and incentives to raise rivals' costs. To study the effects of vertical integration between insurers and hospitals, we develop a model...

El artículo analiza las bases filosóficas e ideológicas del neoliberalismo yplantea que éstas descansan en los pilares del liberalismo, según las cualesel eje central y primordial de la sociedad es el individuo, el cual, debesalvaguardarse por encima de cualquier otra entidad, aún cuando...

Has the United States economy become less competitive in recent decades? One might think so based on a body of research that has rapidly become influential for antitrust policy. We explain that the empirical evidence relating to concentration trends, markup trends, and the effects of mergers...