While transit corridors are often more effective, they are also politically more challenging because countries bear different shares of the project costs. This creates asymmetric incentives to expend limited funds and resources on the corridor over other domestic projects, particularly when it is difficult to establish ex ante which country "gains the most". An honest broker, such as a development bank or a multi-donor programme, can help overcome this problem. In addition, there might also be downsides related to displacement or conflict.