Figure 4

Deviations in calling patterns from gravity null model. Pairs of places that exceed the null gravity law expectation (see text) by 1.0 or more (log of calls) are shown in red, while those that perform under this expectation by −1.0 (log of calls) or less are displayed in blue. This pattern shows over-calling in the southwestern region, including San Pedro, and under-calling east-to-west, indicating little cross-longitudinal connection between the nation’s regions.