Mergers that substantially lessen competition are challenged by antitrust authorities. Instead of blocking anticompetitive transitions straight away, authorities might choose to negotiate with the merging parties and allow the transactions to proceed with modifications that restore or preserve...

We analyze the impact of corporate governance institutions, ownership structures and external capital market constraints on company returns on investment by using a sample of more than 19,000 companies from 61 countries across the world. We show that (1) of these three sets of institutions, the...

This paper analyzes the effects of mergers around the world over the past 15 years. We utilize a large panel of data on mergers to test several hypotheses about mergers. The effects of the mergers are examined by comparing the performance of the merging firms with control groups of nonmerging...

The objective of this paper is to investigate the determinants of EU merger control decisions. We consider a sample of 167 EU mergers between 1990 and 2002 and evaluate their competitive consequences by the reaction of the stock market price of competitors to the merging firms. We then account...

This paper applies a novel methodology to a unique dataset of large concentrations during the period 1990-2002 to assess merger control’s effectiveness. By using data gathered from several sources and employing different evaluation techniques, we analyze the economic effects of the European...

We use a sample of 167 mergers during the period 1990-2002 involving 544 firms either as merging firms or competitors. We contrast a measure of the merger’s profitability based on event studies with one based on accounting data. We find positive and significant correlations between them when...

Based on a database of 326 merger cases scrutinized by the European Commission between 1990 and 2007, we evaluate the economic impact of the change in European merger legislation in 2004. We first propose a general framework to assess merger policy effectiveness, which is based on standard...

We analyze how the team formation process influences the ability composition and performance of teams, showing how self-selection and random assignment affect team performance for different tasks in two natural field experiments. We identify the collaboration intensity of the task as the key...

One of the most conspicuous features of mergers is that they come in waves, and that these waves are correlated with increases in share prices and price/earnings ratios. We test four hypotheses that have been advanced to explain merger waves: the industry shocks, q-, overvaluation and managerial...

The aim of this paper is to describe in detail a set of newly developed indicators of the quality of competition policy, Competition Policy Indexes, or CPIs. The CPIs measure the deterrence properties of a competition policy in a jurisdiction, where for competition policy we mean the antitrust...