Fig. 4.

Model comparison. Red dots represent the fluxes measured with the empirical vector field. In the blue solid line, we show the predicted fluxes with the gravity model with an exponential deterrence function while the green curve corresponds to the radiation results. Results for London of a Φ_W with a comparison between the gravity model and the data of $R_{\mathrm{P}}^2=0.96$ and b for the flux of T with $R_{\mathrm{P}}^2=0.99$. In both cases, d₀ = 9.4 km. c, d are correlation plots between the gravity and the empirical flux. The results for the radiation are systematically below the diagonal. The units for Φ_W are in kilometers (km), while those of Φ_T are in persons multiplied by kilometer (pkm)