Simulation of Merger in Mobile Telephony in Portugal

This article assesses the unilateral e ects of a merger in the Portuguese mobile telephony market. We use aggregate quarterly data from 1999 to 2005 and a nested logit model to estimate the price elasticities of demand and the marginal costs of subscription to mobile services. We nd that mobile services provided by the rms in the market are close substitutes. Based on these estimates, we simulate the e ects of the merger. The merger may result in substantial price increases, even in the presence of large cost e ciencies.