data from the European Commission’s market assessments in merger decisions with production data, we use recent … the performance of almost 600 rival firms in close to 200 merger cases before and after the change in market structure … increase their markups in the years after a merger. The effects are concentrated in markets with few competitors, among firms …

We evaluate the impact of mobile operators merger on unitary price of data and voice by using country …-in-differences estimation strategy, we estimate the effect of 4-to-3 operators merger by comparing the difference between the no …-merging countries and the merging countries before and after the introduction of 4-to-3 operators merger. In accordance with the …