Les décisions de l'Autorité de la concurrence en matière de contentieux ou de concentration sont publiques. Pourtant …

concentration, the Hirschman-Herfindahl (HHI) index and the 4-firm and 8-firm concentration ratios, CR4 and CR8, were utilized. Data …This article provides a look at business concentration for sales and assets for the period 1967 to 2002 based on Theil … concentration, the paper found that the inclusion of service firms with the industrial firms in the list of 500 in 1994 somewhat …

has relatively low information requirements. We propose to use the index as a natural complement to concentration measures …

to compare different methods that can be used to evaluate merger effects: We perform a concentration analysis based on …

has relatively low information requirements. We propose to use the index as a natural complement to concentration measures …

to compare different methods that can be used to evaluate merger effects: We perform a concentration analysis based on …

Stackelberg model yields larger welfare and HHI than the Cournot model. Thus, he demonstrates that beneficial concentration occurs …We investigate the relationship between the Herfindahl-Hirschman Index (HHI) and welfare. First, we discuss the model … occur when m is small. Next, we consider the free entry of followers, and find that beneficial concentration always occurs …

concentration and competition. The efficient structure hypothesis asserts a positive relationship between efficiency and competition … when concentration is high. Although the links among competition, concentration and efficiency have been established by … to be addressed. Thus, this study aims to empirically explore the direction of the relationship among concentration …

authorities. - Barriers to entry in retail banking are significant so that high concentration should be a source of concern. This …, the concentration resulting from the UBS-SBC merger would be simply unacceptable and by a wide margin. - Divestiture is … the most common remedy in banking and it seems to be effective. Given the concentration entailed by the proposed merger …