“…Since the average weight gain has been too abrupt to be the result of a major genetic evolution several scholars have recently focused on other possible explanations such as: the decrease in real food prices (Goldman et al, 2011, Philipson and Posner, 2003, 2008, the reduction of the time cost of food (Cutler et al, 2003, Ruhm, 2012, technological changes due to economic growth (Huffman et al, 2010, Lakdawalla andPhilipson, 2009) or the introduction of welfare-improving technological change (Lakdawalla et al, 2006). However, these explanations are able to explain just partially the so-called "obesity epidemic" (Cawley, 2015).…”