An increasing body of empirical evidence is documenting trends toward rising concentration, profits, and markups in many industries around the world since the 1980s. Two major criticisms of these studies is that concentration and market shares are poorly measured at the national industry level while firm level revenues are a poor indicator of product sales. We use a novel database that identifies over 20,000 product/geographic antitrust markets affected by over 2,000 mergers scrutinized by the European Commission between 1995 and 2014. We show that concentration, as measured by the market-specific post-merger HHI, is larger than reported in the extant literature (at least) by a factor of ten. We also show that concentration has increased over time on average. Yet, there is a great deal of heterogeneity across geographic markets and within broader industries. In a regression analysis that exploits this within-industry variation, we show that barriers to entry are unambiguously positively related to concentration irrespective of time periods, sectors of activity, and geographical market dimension analyzed. Strict past merger enforcement negatively correlates with concentration. Yet, this effect is stronger in the earlier decade (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004) than subsequently. Intangibility of investments consistently displays positive correlation with concentration only for EU wide and worldwide services markets. In contrast, the correlation is negative in national markets. This underscores the importance of the large heterogeneity present in concentration developments across markets.
The present article discusses economic issues related to the design of optimal regulatory contracts on the example of the urban public transport industry. It highlights the importance of the design of efficient regulatory contracts in the context of changes facing the urban transportation industry in the European Union. Furthermore, it provides an overview of the main issues put forward in economic literature related to the design of regulatory contracts. It discusses several problems relevant in this context such as informational asymmetries, transaction costs, and regulatory capture. It also comments on a selection of views presented in economic literature dealing with these issues. Finally, the article presents the regulatory framework, contractual practices and characteristics of the French urban public transport industry. France is well known for its long standing tradition of contracting between the State and the private sector in transportation. The analysis of the French example may help to prove useful insights in this regard.
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