Reinhard Selten

Reinhard Selten
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Name	Reinhard Selten
Caption	Selten in 2001
Birth date	5 October 1930
Birth place	Breslau, Danzig (now Wrocław, Poland)
Death date	23 August 2016
Death place	Poznań, Poland
Nationality	German
Field	Game theory, Experimental economics
Institution	University of Bonn, University of Bielefeld, University of California, Berkeley
Alma mater	Goethe University Frankfurt
Doctoral advisor	Wolfgang Franz and Ewald Burger
Doctoral students	Eric van Damme, Bettina Klaus
Prizes	Nobel Memorial Prize in Economic Sciences (1994)

Reinhard Selten was a pioneering German economist and mathematician whose foundational work in game theory earned him global recognition. He was awarded the Nobel Memorial Prize in Economic Sciences in 1994, sharing the honor with John Harsanyi and John Forbes Nash Jr. for their transformative analysis of equilibria in non-cooperative game theory. Selten is particularly celebrated for introducing the concept of subgame perfect equilibrium, a refinement of the Nash equilibrium that eliminated non-credible threats from strategic predictions. His career, which spanned institutions like the University of Bonn and the University of Bielefeld, also made him a central figure in the development of experimental economics and the study of bounded rationality.

Early life and education

Born in Breslau, then part of the Free City of Danzig, his family was forced to flee during the final stages of World War II, eventually settling in Hesse. Showing an early aptitude for mathematics, he initially intended to study the subject at university but was persuaded to pursue economics due to better career prospects in post-war West Germany. He enrolled at the Goethe University Frankfurt, where he earned his diploma in mathematics in 1957. His doctoral studies were conducted under the supervision of Wolfgang Franz and the mathematician Ewald Burger, culminating in a dissertation on game theory in 1961 that laid the groundwork for his future research.

Academic career

Selten's academic journey took him to several prominent institutions, beginning with an assistantship at the University of Frankfurt. He later held a professorship at the Free University of Berlin before moving to the University of Bielefeld in 1972. In 1984, he accepted a position at the University of Bonn, where he remained as a professor emeritus and established the renowned Laboratory for Experimental Economics. His international influence was solidified through visiting professorships at prestigious universities such as the University of California, Berkeley, and the Hebrew University of Jerusalem. Throughout his career, he was a prolific member of several academies, including the Berlin-Brandenburg Academy of Sciences and Humanities.

Contributions to game theory

Selten's most famous contribution is the formulation of subgame perfect equilibrium in 1965, a solution concept that requires players' strategies to constitute a Nash equilibrium in every subgame of an extensive-form game. This critical refinement addressed logical inconsistencies in dynamic games with sequential moves, profoundly influencing fields like industrial organization and political science. He further advanced the field with his work on the Chain-store paradox and the concept of trembling hand perfect equilibrium, introduced in 1975. His research often challenged classical assumptions, leading him to explore concepts like bounded rationality and to become a leading advocate for experimental economics, using laboratory experiments to test theoretical predictions.

Nobel Memorial Prize in Economic Sciences

In 1994, Selten, along with John Harsanyi and John Forbes Nash Jr., was awarded the Nobel Memorial Prize in Economic Sciences. The Royal Swedish Academy of Sciences cited their pioneering analysis of equilibria in the theory of non-cooperative game theory. Selten's specific recognition was for his work on dynamic strategic interaction and his refinement of equilibrium concepts for extensive-form games. The award highlighted how his theoretical innovations provided essential tools for understanding complex conflicts and cooperation in economics and the social sciences. The prize ceremony in Stockholm cemented his status as a key architect of modern economic theory.

Later work and legacy

In his later years, Selten continued to challenge orthodox economic thinking, dedicating significant effort to developing alternatives to the standard model of perfect rationality. He worked extensively on theories of bounded rationality, often collaborating with psychologists and conducting experiments at his Laboratory for Experimental Economics in Bonn. His influential book, A General Theory of Equilibrium Selection in Games, co-authored with John Harsanyi, was published in 1988. Selten remained active in research until his death in Poznań, Poland, in 2016. His legacy endures through the widespread application of his equilibrium concepts, the thriving field of experimental economics, and the numerous scholars he mentored, including Eric van Damme.

Category:German economists Category:Game theorists Category:Nobel Memorial Prize laureates in Economics Category:1930 births Category:2016 deaths