The aim of this paper is to show the possibility and importance of using the index of concentration of Linda in the analysis of market structure in small economies, and thus, to examine the possibility of its involvement in the practice of anti-monopoly state authorities in those countries. Results of application of the mentioned (system) index are proved in comparison with the results of previously conducted cluster analysis in the food industry, one of the most competitive branch in the economy of Serbia. The study showed the solidity and excellent opportunities of using the index of Lindа even in relatively small economy, in which predominate oligopolistic and other imperfectly-competitive structures.