This document discusses competition issues that can arise with concession contracts for markets like toll roads, ports, and public transport. It covers: 1) How concession bidding processes can be abused through exclusionary practices that disadvantage rivals or exploitative excessive pricing. 2) How merger reviews may use remedies to foster competition, such as funding rivals' bidding costs or requiring early contract terminations. 3) Risks of coordination in concession markets with few competitors and infrequent tenders. 4) Interactions between competition law and laws governing concession tendering and regulation. Proper enforcement of concession contracts is important for competition.