“…This is a problem connected with the partitioning of spatial data with respect to the trends of the epidemic curves. While several attempts have already been made to deal with spatial aspects in the health field, from spatial dependence (Baltagi, Moscone, & Santos, 2018) to spatial heterogeneity (Auteri, Guccio, Pammolli, Pignataro, & Vidoli, 2019; Baltagi, Lagravinese, Moscone, & Tosetti, 2017; Billé, Benedetti & Postiglione, 2017; 2018), a specific, systematic and complete approach to such a grouping problem is not yet available and remains the focus of scientific debate (see e.g. Zhou et al, 2020 and Chasco, Le Gallo, & López, 2018).…”