The aim of this Paper is to evaluate simultaneously market power and the incentives faced by carriers to improve efficiency, taking into account the regulatory changes that have affected the European airline industry. We construct and estimate a model that includes demand, capacity, and cost...

We study the effect of entry on costs and competition in the Portuguese mobile telephony industry. We construct and estimate a model that includes demand, network, and cost equations. The latter accounts for inefficiency and cost reducing effort. We show that failure to account for cost reducing...