“…Second, we contribute to the burgeoning literature on the moral constraints on markets (Kahneman, Knetsch, and Thaler, 1986;Basu, 2003Basu, , 2007Roth, 2007;Leider and Roth, 2010;Ambuehl, Niederle, and Roth, 2015;Elias, Lacetera, and Macis, 2015a,b;Elias, Lacetera, and Macis, ming;Ambuehl, 2017;Clemens, 2017;Exley and Kessler, 2017). While we take no normative stance, a significant proportion of both professional ethicists (Faden and Beauchamp, 1986;Satz, 2010;Kanbur, 2004) and survey participants from the general population (Ambuehl and Ockenfels, 2017) insist that the decision to participate in such transactions should adhere to the principles of informed consent (DHEW 1978, The Belmont Report).…”