“…In recent years a small but increasing number of scholars have succeeded in merging the two views by using spatial interaction models, that is, gravity or origin-destination (O-D) models, to consider both effects simultaneously. Marrocu and Paci (2013), Massidda and Etzo (2012), de la Llano (2012, 2013), Keum (2010), Deng and Athanasopoulos (2011), Patuelli, Mussoni, and Candela (2013), Alvarez-Diaz, d'Hombres, and Ghisetti (2017), all employ spatial interaction models considering bilateral tourism flows between regions of a same country to take into account both demand and supply determinants. 1 These models reveal to policy-makers and tourism stakeholders which elements of supply help in attracting tourism flows and what are the determinants of arrivals on the demand side.…”