Figure 3

CPC related to incoming mobility of the radiation model (in yellow), of the gravity model with an exponential decay (in red), and of the gravity model with a power-law decay (in blue). The model performing better is the gravity model with exponential decay, and this is valid both before and during the introduction of non-pharmaceutical interventions due to the COVID-19 pandemic. In particular, the gravity model with exponential decay reaches an average CPC of 0.762 before the introduction of non-pharmaceutical interventions, 0.666 during the introduction of non-pharmaceutical interventions, and 0.685 over the entire period under analysis