The article is devoted to the ex-post evaluation of the merger approval and the remedy development by Russian competition authority — the Federal Antimonopoly Service (FAS) — using the results of interviews and a sample survey. The analyses and the decisions made by the FAS in several large merger deals completed in 2006–2008 are assessed. The authors explain the comparative advantages of different methods to assess the effects of the public policy employed in Russia, as well as alternative approaches for the evaluation of the effects of the mergers. The data of interviews and sample surveys allow to reject the hypothesis on the restriction of the competition as a result of the merger deals. At the same time the experts are skeptical towards the conditions in the merger remedies and their impact on the market competition.