We investigate mergers in markets where quality differences between products are central and firms may reposition their product lines by adding or removing products of different qualities following a merger. Such mergers are materially different from those studied in the existing literature....

Nominally, competition policy is just as concerned with quality as it is with prices. But in practice, courts and competition authorities rarely analyze quality effects as rigorously as they analyze price effects. We begin this paper by examining some of the reasons why that is so. We then delve...