“…We considered 45 outlets from 11 retail firms in the food sector: Eight belonged to supermarket chain S (Consum), and the rest belonged to 10 remaining firms, be-ing some of them the largest European retailing chains (Aldi, Lidl, DIA, Alcampo, Carrefour, Mercadona, etc.) (Table 2) (Roig-Tierno et al, 2015). We did not consider traditional shops, instead considering only outlets whose sales floor area was greater than 300m 2 and who belonged to a retail firm.…”