With adverse selection, diseconomies of scale associated with hierarchies may induce the implementation of a second-best technology. This occurs whenever rents to lower tiers of the hierarchy increase faster than total surplus. This is more likely with longer hierarchies.

This paper addresses the key determinants of merger failure, in par- ticular the role of innovation (post-merger performance) and technology (ex-ante selection) when rms decide to separate. After a brief review of the existing literature we introduce a model of process innovation where merged...