Fig. 1From: Theoretical study of the effect of ports in the formation of city systemsCore assumptions. a Central-place. b Coastal-urban primacy. This figure exemplifies our assumptions about the behavior of the city-size distribution. The arrows in each subfigure point out the possible change in the city-size distribution. This figure was inspired by the ideas Vance (1970) and Lugo et al. (2020)Back to article page