This paper investigates the merger wave hypothesis for the US and the UK employing a Markov regime switching model …. Using quarterly data covering the last thirty years, for the US, we identify the beginning of a merger wave in the mid 1990s … but not the much-discussed 1980s merger wave. We argue that the latter finding can be ascribed to the refined methods of …

, we evaluate the 2013 merger between Amer- ican Airlines and US Airways. Our results highlight that spillovers in entry … and post-merger network readjustments play an important role in shaping post-merger outcomes. …