An extract from The Dominance and Monopolies Review - 7th edition

Market definition and market power

The definition of dominance can be found in Article 3 of Law No. 4054, as 'the power of one or more undertakings in a certain market to determine economic parameters such as price, output, supply and distribution independently from competitors and customers'. Enforcement trends show that the Competition Board is inclined to broaden the scope of application of the Article 6 prohibition by diluting the 'independence from competitors and customers' element of the definition to infer dominance even in cases where clear dependence or interdependence between either competitors or customers exists.

When unilateral conduct is in question, dominance in a market is the primary condition for the application of the prohibition stipulated in Article 6. To establish a dominant position, first the relevant market has to be defined, and second the market position has to be determined. The relevant product market includes all goods or services that are substitutable from a customer's point of view. The Guideline on Market Definition considers demand-side substitution as the primary standpoint of the market definition. Therefore, the undertakings concerned have to be in a dominant position in the relevant markets, which are to be determined for every individual case and circumstance. Under Turkish competition law, the market share of an undertaking is the primary point for evaluating its position in the market. In theory, there is no market-share threshold above which an undertaking will be presumed to be dominant. On the other hand, subject to exceptions, an undertaking with a market share of 40 per cent is a likely candidate for dominance, whereas a firm with a market share of less than 25 per cent would not generally be considered dominant.

In assessing dominance, although the Competition Board considers a large market share as the most indicative factor of dominance, it also takes account of other factors, such as legal or economic barriers to entry, and the portfolio power and financial power of the incumbent firm. Therefore, domination of a given market cannot be solely defined on the basis of the market share held by an undertaking or other quantitative elements; other market conditions, as well as the overall structure of the relevant market, should also be assessed in detail.

Collective dominance is also covered by Article 6. On the other hand, precedents concerning collective dominance are not mature enough to allow for a clear inference of a set of minimum conditions under which collective dominance should be alleged. That said, the Competition Board has considered it necessary to establish an economic link for a finding of abuse of collective dominance.

Being closely modelled on Article 102 of the TFEU, Article 6 of Law No. 4054 is theoretically designed to apply to unilateral conduct of dominant firms only. When unilateral conduct is in question, dominance in a market is a condition precedent to the application of the prohibition laid down in Article 6. In practice, however, indications show that the Competition Board is increasingly and alarmingly inclined to assume that purely unilateral conduct of a non-dominant firm in a vertical supply relationship could be interpreted as giving rise to an infringement of Article 4, which deals with restrictive agreements. With a novel interpretation, by way of asserting that a vertical relationship entails an implied consent on the part of the buyer, and that this allows Article 4 enforcement against a 'discriminatory practice of even a non-dominant undertaking' or 'refusal to deal of even a non-dominant undertaking' under Article 4, the Competition Board has in the past attempted to condemn unilateral conduct that should not normally be prohibited since it is not engaged in by a dominant firm.

Owing to this peculiar concept (i.e., Article 4 enforcement becoming a fall-back to Article 6 enforcement if the entity engaging in unilateral conduct is not dominant), certain unilateral conduct that can only be subject to Article 6 enforcement (i.e., as if the engaging entity were dominant) if it has been reviewed under Article 4 (restrictive agreement rules). The and Trakya Cam decisions are the latest examples of this trend. In, the Competition Board analysed whether, which was found to be in a dominant position in the online accommodation reservation platform services market, lessened competition in the said market through the 'best price guarantee' practices in terms of the booking services they offer. was fined for violation of Articles 4 and 6 of Law No. 4054. In Trakya Cam, the Competition Board assessed that Trakya Cam Sanayii AŞ de facto implemented distribution agreements in 2016 that had been determined to be in violation of Articles 4 and 6 of Law No. 4054 through a Competition Board decision dated 2 December 2015, and revoked the individual exemption granted to Trakya Cam's industrial customer purchasing agreement that it signed with its industrialist customers. Trakya Cam was fined 17,497,141.63 lira, and was ordered to provide 18 of its distributors with written notices stating the absence of regional exclusivity, and advising them that they may conduct sales activities throughout Turkey.