. . . [M]any landlocked countries restrict trade in the very services that connect them with the rest of the world. On average, telecommunications and air-transport policies are significantly more restrictive in landlocked countries than elsewhere. The phenomenon is most starkly visible in Sub-Saharan Africa and is associated with lower levels of political accountability.That is from the new paper "Landlocked or Policy Locked? How Services Trade Protection Deepens Economic Isolation" by Borchert et al.