“…According to our analysis, 9 of the 20 studies (Fig. 7) that include this variable report some dependence between unit pricing and household behaviour [3,7,8,11,20,30,33,45,63], while 11 of 20 report no link between them [2,26,49,55,56,61,[64][65][66][67][68]. Thus the results are not consistent.…”