To the issue of the conceptional definition of "aggregator" and "marketplace" in the field of prohibited abuse of dominant position by digital platform operator

The purpose of the research. Russian antitrust law provides special rules regarding the determination of a dominant position for transactional digital platforms operators, and also contains prohibitions on the abuse of a dominant position for them. At the same time, the application of these prohibitions requires the definition of the concepts of “digital platform”, “aggregator”, “marketplace”, which, being included in regulatory legal acts, on the one hand, are interpreted as synonymous, on the other hand, are filled with different content. It seems that for the purposes of applying antitrust prohibitions on abuse of a dominant position using digital platforms and conducting a correct legal assessment of the activities of economic entities in this part, it is necessary to identify the correlation between the concepts of “digital platform”, “aggregator” and “marketplace”, as well as to study their similarities and differences in order to develop the most optimal legal approaches to the explication of these phenomena in law in order to ensure legal protection and protection of competition in digital markets. Results. Based on the results of comparing legal approaches to defining the concepts under study, the author comes to the conclusion that the concept of “digital platform” is common in relation to the concepts of “aggregator” and “marketplace”, while the categories of aggregator and marketplace are not identical: they differ in a number of criteria such as ownership of physical infrastructure, the method of connecting sellers (suppliers) to the platform, the approach to posting content, methods of communication between consumers and sellers (suppliers), target functionality, brand, and such distinctive features must be taken into account when forming legal approaches to prohibiting the abuse of a dominant position by operators of digital platforms.