“…The age of old age is therefore a matter of debate. There is also no consensus in the gambling literature, with the lower bound being, depending on the study, 50 years (e.g., [ 29 , 30 ]), 55 years (e.g., [ 2 , 12 , 17 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]), 56 years (e.g., [ 38 ]), 60 years (e.g., [ 14 , 39 , 40 ]), 65 years (e.g., [ 41 , 42 , 43 ]), or sometimes 70 years (e.g., [ 44 ]).…”