“…It has long been recognized that people discount future rewards and benefits, that is, they consider future rewards and benefits less attractive than the same rewards and benefits available immediately (Ersner-Hershfield, Wimmer, & Knutson, 2009; Fishburn & Rubinstein, 1982; Frederick, Loewenstein, & O’Donoghue, 2002; Green, Fristoe, & Myerson, 1994; Green & Myerson, 1996; Green, Myerson, & McFadden, 1997; Kalenscher, 2009; Kalenscher, Ohmann, & Güntürkün, 2006; Kalenscher & Pennartz, 2008; Kalenscher & Tobler, 2008; Kirby & Herrnstein, 1995; Koopmans, 1960; Laibson, 1997; Lancaster, 1963; Rachlin, Raineri, & Cross, 1991; Samuelson, 1937). Decisions over time and the decreased attractiveness of a delayed reward relative to an immediately available reward has been captured by economic theory already more than 70 years ago (Samuelson, 1937).…”