For 10 points, name this game theoretician who developed a namesake type of equilibrium, an American economist also noted for being a paranoid schizophrenic.
This thinker accused Keynesian economists of teaching that "bad money is better than good" in his lecture "Ideal Money". He names a concept that was refined by a German economist into a "perfect" variant that applies to all sub-profiles of dynamic situations. One concept developed by this man, which is a stronger form of a similar concept named for epsilon, is named for Cournot in the case of pure strategies. With Reinhard Selten and John (*) Harsanyi, this man won the 1994 Economics Nobel. He names a scenario in which players in a non-cooperative game know each other's strategies and stand to gain nothing by changing their own strategy. For 10 points, name this game theoretician who developed a namesake type of equilibrium, an American economist also noted for being a paranoid schizophrenic.
This thinker accused Keynesian economists of teaching that "bad money is better than good" in his lecture "Ideal Money".
John Forbes Nash Jr.