The following post comes to us from David Becher, Associate Professor of Finance at Drexel University, Harold Mulherin, Professor of Banking and Finance at the University of Georgia, and Ralph Walkling, Stratakis Chair in Corporate Governance at Drexel University.
In the paper, Sources of Gains in Corporate Mergers: Refined Tests from a Neglected Industry, forthcoming in the Journal of Financial and Quantitative Analysis, we provide new tests of the synergy, collusion, and anticipation hypotheses using stock and product pricing data from the utility industry in the United States. The utility industry has been omitted from prior analysis of synergy and collusion in mergers and thus provides out-of-sample tests of these hypotheses. Moreover, features of the industry allow ready identification of geographic rivals and thereby facilitate clean tests of the competing hypotheses.