A change in the index selection rules of Deutsche Börse provides a unique opportunity to investigate the drivers behind the decision to a bolish dual-class shares. As of June 2002, selection is based on the market capitalization of the free-float of the more liquid share class rather than the...

While empirical studies that use event-study methodology find on average that the gains from mergers and acquisitions are positive, those focusing on accounting figures tend to find a significant drop in performance. We argue that each of the four possible combinations between positive or...