His close friend George Stigler explained, "As is customary in science, he did not win a full victory, in part because research was directed along different lines by the theory of rational expectations, a newer approach developed by Robert Lucas, also at the University of Chicago."
Njegov bliski prijatelj George Stigler objasnio, "Kao što je uobičajeno u znanosti, nije osvojio punu pobjedu, dijelom i zbog toga je istraživanje usmjereno po različitim linijama teorije racionalnih očekivanja, novijim pristupom koji je razvio Robert Lucas, također na Sveučilištu Chicago. "