Abstract: Maritime transport costs significantly impede international trade. This paper examines why these costs are so high in some countries, and quantifies the importance of two explanations: restrictive trade policies and private anti-competitive practices. We find that both matter but the latter have a greater impact. Trade liberalization and the breakup of private carrier agreements would lead to an average reduction in liner transport prices by one-third and to cost savings of up to $3 billion on goods carried to the US alone. The policy implications are clear: not only is there a need for further liberalization of government policy, but also for strengthened international disciplines on restrictive business practices. We propose an...