Merger approval decisions lie at the heart of competition policies. Farrell and Shapiro (1990) presented a model stating safe harbour rules for merger approval. In the presence of sequential mergers, however, computation of the sufficient external effect criterion for each merger may not be...

One of the mechanisms that is implemented in the cost containment wave in the health-care sectors in western countries is the definition, by the third-party payer, of a set of preferred providers. The insured patients have different access rules to such providers when ill. The rules specify the...

We estimate the impact of health insurance coverage beyond National Health Insurance on the demand for several health services. Traditionally, the literature has tried to deal with the endogeneity of the private (extra) insurance decision by finding instrumental variables. Since a priori...

Our concern is about a firm-specific industrial policy. When R&D subsidies or taxes are differentiated among firms, the question arises which firms in an industry should receive such support. We analyse a situation where firms differ in their R&D technologies in two distinct ways: they differ...

We show that the nature and extent of trade is significantly affected by the pricing policy that firms are allowed to employ. A switch from discriminatory to non-discriminatory pricing (e.g. strict anti-dumping laws) leads to a switch from two-way trade to one-way trade. It is far from true that...

We show that the number of merger proposals (frequency-based deterrence) is a more appropriate indicator of underlying changes in merger policy than the relative anti-competitiveness of merger proposals (composition-based deterrence). This has strong implications for the empirical analysis of...

We develop a model of waiting lists for public hospitals when physicians deliver both private and public treatment. Public treatment is free but rationed, i.e., only cases meeting some medical criteria are admitted for treatment. Private treatment has no waiting time but entails payment of a...

Modern economies predominantly rely on the working of markets. To ensure that markets are a level playing field for economic agents, competition policies are usually included in the legal framework that regulates economic activities. Portugal is no exception to this rule. This paper reviews the...

This paper addresses the impact of payment systems on the rate of technology adoption. We present a model where technological shift is driven by demand uncertainty, increased patients' benefit, financial variables, and the reimbursement system to providers. Two payment systems are studied: cost...

There is currently little knowledge on the consequences of diffusion of cellular technology on the incumbent fixed-link telephony service. We address this issue by estimation of diffusion curves for both technologies, allowing for potential cross-effects, using data from a small European...