This paper investigates the effect of merger-driven market concentration on the markups of non-merging rival firms in Europe’s paper manufacturing industry. Using a representative data set of 400 independently-owned companies spanning a ten-year period, we aim to disentangle the impact of...

Even a cursory review of the Antitrust Division's new Merger Guidelines reveals that they revolve around the concept of “concentration” and advance a particular method of measuring it – the Herfindahl-Hirschman Index. While concentration is scarcely a new idea in the antitrust treatment of...

We provide the first estimates of the extent of common ownership of competing firms in Australia. Combining data on market shares and substantial shareholdings, we calculate the impact of common ownership on effective market concentration. Among firms where we can identify at least one owner, 31...