Responsibilities of Digital Marketplace Platforms and Anticompetitive Assessments in Business Law
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Abstract
This article examines competition law in the digital marketplace sector, focusing on the regulation of platforms' duties and responsibilities towards merchants and consumers. The research uses a normative juridical method based on qualitative literature studies and thematic synthesis of relevant legislation and verified academic doctrines. The analysis positions marketplaces as trade service providers that regulate market access through terms of service, interface design, and data-based decisions. The first finding shows that the construction of platform obligations towards consumers rests on the obligations of information honesty, transaction security, data protection, and the provision of enforceable loss recovery. Towards merchants, platform obligations include fair treatment, transparency of commission and promotion terms, orderly account enforcement procedures, and the provision of a secure and well-functioning system as a prerequisite for business certainty. The second finding formulates normative measures to assess potentially anti-competitive actions through access arrangements, ranking, and service policies. These measures assess the relevant market and market power, then test whether the policies create artificial barriers to entry, discrimination without objective justification, self-preferencing, service tying or bundling, and consumer steering restrictions through anti-steering. The assessment is conducted using a rule of reason approach that weighs the consequences of exclusion and consumer harm against efficiency justifications and less restrictive alternatives. The article emphasizes the importance of procedural accountability, including notification of policy changes, testable reasons, effective appeal channels, and data management that limits conflicts of interest. The practical implication is the need for internal governance that documents policy objectives, ranking parameters at the category level, and records of sanctions imposed for auditing purposes. Platforms are encouraged to establish data access separation between business units, account recovery mechanisms, and rapid security incident reporting. For regulators, the results of this study support the development of PMSE compliance and the strengthening of dispute resolution coordination. For the market, the application of these normative measures is expected to maintain quality-based competition, reasonable prices, and transaction trust, as well as minimize uncertainty for small traders and consumers in daily transactions in the marketplace.
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