The Impact of Demand on Container Dwell Time
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they are too small, but some still account for less than 5 percent of the total volume of imports. This might explain the problem of selection bias.
Reference Refas, Salim, and Thomas Cantens. 2011. “Why Does Cargo Spend Weeks in African Ports? The Case of Douala, Cameroon.� Policy Research Working Paper 5565, World Bank, Washington, DC.