Sooner or later

Both choices ask the same thing: wait 4 more weeks for 10 more. The second simply starts 26 weeks later. In 1995 Keren and Roelofsma gave the first choice to one group of 60 students in Amsterdam and the second to another group of 60, with the same numbers in Dutch guilders. In the first group, 82% chose the 100 now. In the second, 37% chose the 100 in 26 weeks and 63% the 110 in 30 weeks (Keren & Roelofsma, 1995).

Keren, G., & Roelofsma, P. (1995). Immediacy and Certainty in Intertemporal Choice. Organizational Behavior and Human Decision Processes, 63(3), 287-297.