“…Among the literature discussing the impact of endogenous transport costs on economic geography, one additional channel, except the economies of transport density, is the directional imbalance (e.g., Behrens and Picard, 2011;Jonkeren et al, 2011;Takahashi, 2011;Tanaka and Tsubota, 2016), which suggests the positive relation between directional imbalance and transport costs. For example, the container freight index from Shanghai to Los Angeles, or eastbound, is 1,330 USD per TEU in January 2016; however, the index from Los Angeles to Shanghai, or westbound, is 600 USD per TEU only because of less demand (Drewry Shipping Consultants Ltd., 2016).…”