This article examines the use of the Herfindahl-Hirschman index in the antimonopoly policy of Slovak Republic. This index is a commonly accepted indicator that is focused on absolute concentration of the industry and in that way it allows to measure market concentration for purposes of antitrust enforcement. The index is used for the analyses of absolute concentration of the branch: Electricity, gas, steam and hot water during the years 2004 - 2006. Besides it, the sensitivity analysis that gives the information about characteristics of the industry after the entrance of the new subject on the market is presented. Presented analysis of the branch indicates that also by increasing number of subjects the absolute concentration does not have decrease.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.