Igor Smaragdov

The paper deals with the evidences of ambiguity of communication between market structure (distribution of market shares – competences of its subjects) and quantitative estimates of unevenness of these distributions at application of methods of competences concentration index assessment (market shares) of their subjects. The most known subjects are decile and quintile coefficients, Lorenz-Jeanie's method (Jeanie's index) and Herfindahl-Hirschman index: absolutely different distributions of competences can be character-ized by the same value of index.

The paper presents the structuring results of the Russian investment services market by market cores based on the data of the rating agency “Expert RA” in terms of total dealer and broker turns of 50 leading invest-ment firms in 2012-2013 and quantitative assessment of the level of market competiveness.

The paper presents formed on the basis of the RIA rating data on volumes collected by insurance premiums in 2014 multicore competitive structure of the insurance market in Russia and estimates the level of competition on it.

The paper presents the results of analysis of formation and changes in internal structure of the industry of four hundred major Russian enterprises in 2004-2014, made on the basis of the rating agency “Expert RA in terms of sales (rating “Expert-400”).

The paper analyzes the structure of the global economic system based on the rating of the World Bank in terms of nominal gross domestic product of 190 countries in the world for 2013, revised in December 2014. The analysis was conducted using the author's technique of separation of market participants on their competence using criteria for selection of large, medium and small nuclei.