This research uses event study methodology applied to stock market data to measure the impact of competition law enforcement on share values. It addresses the gap in knowledge of how the impact of law enforcement can be measured and quality of present law evaluated. To address this gap also...

Market definition, and, in particular, being able to identify who is in which product market, lies at the heart of competition law. The identification of demand elasticities necessary to conduct a formal definition of product market can be time consuming and often there is insufficient data to...

We evaluate the impact of European antitrust policy by analyzing the stock market response to investigation announcements, infringement decisions, and appeals. We examine a sample of 253 companies involved in 118 European antitrust cases over the period 1974-2004. We uncover significantly...