Z:gnu-www-ja-frank--e73258-If economics training plays a/en

If economics training plays a causal role in uncooperative behavior, then we would expect defection rates in the prisoner's dilemma experiments to rise with exposure to training in economics. Again focusing on the no-promises subsample, the defection rates are broken down by major and level of education in Figure 9. As shown, the defection rate for economics majors is virtually the same for both upperclassmen (juniors and seniors) and underclassmen (freshmen and sophomores). By contrast, the defection rate for nonmajors is approximately 33 percent higher for underclassmen than for upperclassmen.