Figure 6

Test of Poisson statistics assumption. (a) Mean and variance computed on the tail of the data (taken as the last two available weeks considered as background noise, without rioting activity). Each circle corresponds to one département. For comparison, we generated fake Poisson data mimicking the typical values observed in the dataset: the grey dots give the sample mean and variance for 14 realizations of 1000 Poisson processes, with true means randomly generated between 0 and 10. (b) For each région, Poissonness plot computed for the tail of the data. See Supplementary Table S2 for more details on the régions.