Vienna model results (IMAGE)
Caption
Vienna model results. A) Heat map of Vienna of the observed arrivals in Austria for the four top diasporas in Austria. B) Heat map of the diaspora model estimates in Vienna. C) Heat map of the gravity model estimates in Vienna. D) Spider plots of the top four diasporas in Austria, where each section is one of Vienna’s 23 districts. The ratio between the modelled and the observed arrivals—the estimate ratio—is displayed for each district for both the gravity model in grey (GER) and the diaspora model in red (DER). The inner circle (dark red) is when the observed and the modelled arrivals are equal. When the polygons are smaller than the circle, the model underestimates the number of migrants but overestimates that number when it is bigger.
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