Karl Sigmund

Karl Sigmund joined IIASA in January 1984. He is currently working in the Evolution and Ecology Program.

Professor Sigmund received his Ph.D. from the Institute for Mathematics of the University of Vienna in 1968. After spending some time in Manchester, UK (1968-69), at the Institut des Hautes Etudes in Paris (1969-70), and at the Hebrew University in Jerusalem (1971-72), he returned to Vienna. In 1973 he became Professor at the Institute of Mathematical Statistics in Göttingen, Germany. Since 1974 he has been a full professor at the Institute for Mathematics, University of Vienna. In 1996 he became a corresponding member of the Austrian Academy of Sciences.

His current scientific interests include game-theoretical modeling of animal behavior, mathematical models in ecology and population dynamics, and stochastic and deterministic treatment of immunological processes. He has published a number of articles and books on these subjects.


Last update: 25-SEP-2007

Sasaki,T. Braennstroem,A. Dieckmann,U. Sigmund,K. (2012)

The take-it-or-leave-it option allows small penalties to overcome social dilemmas ... More

Sigmund,K. (2012)

Moral assessment in indirect reciprocity ... More

Frank,A. Goud Collins,M. Clegg,M. Dieckmann,U. Kremenyuk,V. Kryazhimskiy,A. Linnerooth-Bayer,J. Levin,S. Lo,A. Ramalingam,B. Ramo,J. Roy,S. Saari,D. Shtauber,Z. Sigmund,K. Tepperman,J. Thurner,S. Yiwei,W. von Winterfeldt,D. (2012)

Security in the Age of Systemic Risk: Strategies, Tactics and Options for Dealing with Femtorisks and Beyond ... More

Sigmund,K. Hauert,C. Traulsen,A. De Silva,H. (2011)

Social control and the social contract: The emergence of sanctioning systems for collective action ... More

Sigmund,K. (2011)

The role of human behavioral games in international negotiations ... More

Sigmund,K. De Silva,H. Traulsen,A. Hauert,C. (2010)

Social learning promotes institutions for governing the commons ... More

Hilbe,C. Sigmund,K. (2010)

Incentives and opportunism: From the carrot to the stick ... More

De Silva,H. Hauert,C. Traulsen,A. Sigmund,K. (2010)

Freedom, enforcement, and the social dilemma of strong altruism ... More

Uchida,S. Sigmund,K. (2010)

The competition of assessment rules for indirect reciprocity ... More

Sigmund,K. (2010)

The Calculus of Selfishness ... More

Sigmund,K. (2010)

Let's keep the debate focused (in "Correspondence") ... More

Sigmund,K. (2009)

Sympathy and similarity: The evolutionary dynamics of cooperation ... More

Traulsen,A. Hauert,C. De Silva,H. Nowak,M.A. Sigmund,K. (2009)

Exploration dynamics in evolutionary games ... More

De Silva,H. Sigmund,K. (2009)

Public good games with incentives: The role of reputation ... More

Sigmund,K. (2009)

The loitering presence of the rational actor ... More

Senechal,M. Beham,B. Sigmund,K. (2008)

A short tale of two cities: Otto Schreier and the Hamburg-Vienna connection ... More

Hauert,C. Traulsen,A. De Silva,H. Nowak,M.A. Sigmund,K. (2008)

Public goods with punishment and abstaining in finite and infinite populations ... More

Sigmund,K. (2007)

Punish or perish? Retaliation and collaboration among humans ... More

Hauert,C. Traulsen,A. Brandt,H. Nowak,M.A. Sigmund,K. (2007)

Via freedom to coercion: The emergence of costly punishment ... More

Nowak,M.A. Sigmund,K. (2007)

How populations cohere: Five rules for cooperation ... More

Brandt,H. Ohtsuki,H. Iwasa,Y. Sigmund,K. (2007)

A survey on indirect reciprocity ... More

Sigmund,K. (2007)

Punish or Perish? Retaliation and Collaboration among Humans ... More

Hauert,C. Traulsen,A. Brandt,H. Nowak,M.A. Sigmund,K. (2007)

The Emergence of Altruistic Punishment: Via Freedom to Enforcement ... More

Nowak,M.A. Sigmund,K. (2007)

How Populations Cohere: Five Rules for Cooperation ... More

Brandt,H. Sigmund,K. (2006)

The good, the bad and the discriminator - Errors in direct and indirect reciprocity ... More

Brandt,H. Hauert,C. Sigmund,K. (2006)

Punishing and abstaining for public goods ... More

Brandt,H. Ohtsuki,H. Iwasa,Y. Sigmund,K. (2006)

A Survey on Indirect Reciprocity ... More

Brandt,H. Sigmund,K. (2005)

Indirect reciprocity, image scoring, and moral hazard ... More

Sigmund,K. (2005)

The man of the crowd ... More

Sigmund,K. (2005)

John Maynard Smith and evolutionary game theory ... More

Nowak,M.A. Sigmund,K. (2005)

Evolution of indirect reciprocity ... More

Nowak,M.A. Sigmund,K. (2005)

Evolution of Indirect Reciprocity ... More

Brandt,H. Sigmund,K. (2005)

Indirect Reciprocity, Image-Scoring and Moral Hazard ... More

Sigmund,K. (2005)

John Maynard Smith and Evolutionary Game Theory ... More

Brandt,H. Sigmund,K. (2005)

Punishing and Abstaining for Public Goods ... More

Brandt,H. Sigmund,K. (2005)

The Good, the Bad and the Discriminator - Errors in Direct and Indirect Reciprocity ... More

Brandt,H. Sigmund,K. (2004)

The logic of reprobation: Assessment and action rules for indirect reciprocity ... More

Sigmund,K. (2004)

Kepler's conjecture ... More

Sigmund,K. (2004)

Play it again, John ... More

Sigmund,K. (2004)

Q & A ... More

Sigmund,K. (2004)

Three's company when seeking unanimity ... More

Sigmund,K. (2004)

Failing phoenix: Tauber, Helly, and Viennese life insurance ... More

Nowak,M.A. Sigmund,K. (2004)

Evolutionary dynamics of biological games ... More

Hauert,C. Haiden,N. Sigmund,K. (2004)

The dynamics of public goods ... More

Sigmund,K. (2004)

Kolmogorov et la dynamique des populations ... More

Nowak,M.A. Sigmund,K. (2004)

Population dynamics in evolutionary ecology ... More

Hauert,C. Haiden,N. Sigmund,K. (2004)

The Dynamics of Public Goods ... More

Brandt,H. Sigmund,K. (2004)

The Logic of Reprobation: Assessment and Action Rules for Indirect Reciprocation ... More

Nowak,M.A. Sigmund,K. (2004)

Evolutionary Dynamics of Biological Games ... More

Sigmund,K. (2003)

"Was you ever bit by a dead bee?" - Evolutionary games and dominated strategies ... More

Hofbauer,J. Sigmund,K. (2003)

Evolutionary game dynamics ... More

Brandt,H. Hauert,C. Sigmund,K. (2003)

Punishment and reputation in spatial public goods games ... More

Henrich,J. Bowles,S. Boyd,R.T. Hopfensitz,A. Richerson,P.J. Sigmund,K. Smith,E.A. Weissing,F.J. Young,H.P. (2003)

The cultural and genetic evolution of human cooperation ... More

Sigmund,K. (2003)

Die Oekonomie der Spiele: Zum 100. Geburtstag von John von Neumann ... More

Sigmund,K. (2003)

Nachlese zu den 'Goedel-lectures' ... More

Hofbauer,J. Sigmund,K. (2003)

Evolutionary Game Dynamics ... More

Sigmund,K. Hauert,C. (2002)

Altruism ... More

Hauert,C. De Monte,S. Hofbauer,J. Sigmund,K. (2002)

Volunteering as Red Queen mechanism for co-operation in public goods games ... More

Nowak,M.A. Sigmund,K. (2002)

Bacterial game dynamics ... More

Sigmund,K. Fehr,E. Nowak,M.A. (2002)

The economics of fair play ... More

Dieckmann,U. Sigmund,K. Sabelis,M.W. Metz,J.A.J. (2002)

Adaptive dynamics of infectious diseases: Epilogue ... More

Sigmund,K. Sabelis,M.W. Dieckmann,U. Metz,J.A.J. (2002)

Adaptive dynamics of infectious diseases: Introduction ... More

Nowak,M.A. Sigmund,K. (2002)

Super- and coinfection: The two extremes ... More

Dieckmann,U. Metz,J.A.J. Sabelis,M.W. Sigmund,K. (2002)

Adaptive Dynamics of Infectious Diseases: In Pursuit of Virulence Management ... More

Hauert,C. De Monte,S. Hofbauer,J. Sigmund,K. (2002)

Volunteering as Red Queen Mechanism for Co-operation in Public Goods Games ... More

Sigmund,K. (2002)

The Economics of Fairness ... More

Sigmund,K. (2002)

William D. Hamilton's Work in Evolutionary Game Theory ... More

Nowak,M.A. Sigmund,K. (2002)

Super- and Coinfection: The Two Extremes ... More

Sigmund,K. (2001)

William D. Hamilton's work in evolutionary game theory ... More

Sigmund,K. (2001)

Kepler in Eferding ... More

Sigmund,K. Nowak,M.A. (2001)

Evolution - Tides of tolerance ... More

Sigmund,K. Hauert,C. Nowak,M.A. (2001)

Reward and punishment in minigames ... More

Hauert,C. De Monte,S. Sigmund,K. Hofbauer,J. (2001)

Oscillations in Optional Public Good Games ... More

Sigmund,K. Hauert,C. Nowak,M.A. (2001)

Reward and Punishment in Minigames ... More

Sigmund,K. Nowak,M.A. (2000)

A tale of two selves ... More

Sigmund,K. Nowak,M.A. (2000)

Playing for keeps ... More

Sigmund,K. Nowak,M.A. (2000)

Shrewd investments ... More

Sigmund,K. Golland,L. (2000)

Exact thought in a demented time: Karl Menger and his Viennese mathematical colloquium ... More

Page,K.M. Nowak,M.A. Sigmund,K. (2000)

The spatial ultimatum game ... More

Sigmund,K. Nowak,M.A. Page,K.M. (2000)

Fairness versus reason in the ultimatum game ... More

Nowak,M.A. Sigmund,K. (2000)

Games on grids ... More

Sigmund,K. Nowak,M.A. (2000)

A Tale of Two Selves ... More

Nowak,M.A. Page,K.M. Sigmund,K. (2000)

Fairness Versus Reason in the Ultimatum Game ... More

Posch,M. Pichler,A. Sigmund,K. (1999)

The efficiency of adapting aspiration levels ... More

Sigmund,K. (1999)

Deviating from the line ... More

Nowak,M.A. Sigmund,K. (1999)

Phage-lift for game theory ... More

Sigmund,K. Nowak,M.A. (1999)

Evolutionary game theory ... More

Sigmund,K. (1999)

The social life of automata ... More

Nowak,M.A. Sigmund,K. (1999)

Games on Grids ... More

Sigmund,K. Nowak,M.A. (1998)

What two legs can learn from four legs ... More

Sigmund,K. (1998)

Population dynamics of conflict and cooperation ... More

Nowak,M.A. Sigmund,K. (1998)

Evolution of indirect reciprocity by image scoring ... More

Sigmund,K. Szathmary,E. (1998)

Biomathematics: Merging lines and emerging levels ... More

Sigmund,K. (1998)

Complex adaptive systems and the evolution of reciprocation ... More

Nowak,M.A. Sigmund,K. (1998)

Darwin's Dynamik ... More

Nowak,M.A. Sigmund,K. (1998)

The dynamics of indirect reciprocity ... More

Jansen,V.A.A. Sigmund,K. (1998)

Shaken, not stirred: On permanence in ecological communities ... More

Hofbauer,J. Sigmund,K. (1998)

Evolutionary Games and Population Dynamics ... More

Posch,M. Pichler,A. Sigmund,K. (1998)

The Efficiency of Adapting Aspiration Levels ... More

Sigmund,K. (1998)

The Population Dynamics of Conflict and Cooperation ... More

Jansen,V.A.A. Sigmund,K. (1998)

Shaken, Not Stirred: On Permanence in Ecological Communities ... More

Sigmund,K. (1998)

Complex Adaptive Systems and the Evolution of Reciprocation ... More

Sigmund,K. (1998)

The Social Life of Automata ... More

Nowak,M.A. Sigmund,K. (1998)

Evolution of Indirect Reciprocity by Image Scoring / The Dynamics of Indirect Reciprocity ... More

Sigmund,K. (1997)

Automaten fuer wiederholte Spiele ... More

Boerlijst,M.C. Nowak,M.A. Sigmund,K. (1997)

The logic of contrition ... More

Boerlijst,M.C. Nowak,M.A. Sigmund,K. (1997)

Equal pay for all prisoners ... More

Sigmund,K. (1997)

Games evolution plays ... More

Boerlijst,M.C. Nowak,M.A. Sigmund,K. (1997)

Equal Pay for all Prisoners / The Logic of Contrition ... More

Sigmund,K. Helmberg,G. (1996)

Nestor of mathematicians: Leopold Vietoris turns 105 ... More

Sigmund,K. Nowak,M.A. (1996)

The natural history of mutual aid ... More

Sigmund,K. (1995)

Hans Hahn and the foundational debate ... More

Sigmund,K. Young,H.P. (1995)

Introduction ... More

Nowak,M.A. May,R.M. Sigmund,K. (1995)

Antigenic oscillations and shifting immunodominance in HIV-1 infections ... More

Sigmund,K. Nowak,M.A. (1995)

Invasion dynamics of the finitely repeated Prisoner's Dilemma game ... More

Sigmund,K. Nowak,M.A. May,R.M. (1995)

The arithmetics of mutual help ... More

May,R.M. Nowak,M.A. Sigmund,K. (1995)

Immune response against multiple epitopes ... More

Sigmund,K. (1995)

A philosopher's mathematician: Hans Hahn and the Vienna Circle ... More

Sigmund,K. (1995)

Darwin's "circles of complexity": Assembling ecological communities ... More

Sigmund,K. Schmetterer,L. (1995)

Hans Hahn - Kurzbiographie ... More

Sigmund,K. Nowak,M.A. (1994)

The alternating prisoner's dilemma ... More

Sigmund,K. (1994)

Cooperation in heterogeneous populations ... More

Sigmund,K. (1994)

Monomorphic and polymorphic populations ... More

Kurzhanski,A.B. Sigmund,K. (1989)

Evolution and Control in Biological Systems ... More

Gaunersdorfer,A. Hofbauer,J. Sigmund,K. (1989)

The Dynamics of Asymmetric Games ... More

Hofbauer,J. Sigmund,K. (1989)

On the Stabilizing Effect of Predators and Competitors on Ecological Communities ... More

Novak,M. Sigmund,K. (1988)

Game Dynamical Aspects of the Prisoner's Dilemma ... More

Kurzhanski,A.B. Sigmund,K. (1987)

Dynamical Systems; Proceedings of an IIASA Workshop, Sopron, Hungary, September 9-13, 1985 ... More

Sigmund,K. (1987)

Grade Dynamics, Mixed Strategies and Gradient Systems ... More

Aubin,J.-P. Saari,D.G. Sigmund,K. (1985)

Dynamics of Macrosystems; Proceedings of a Workshop, September 3-7, 1984 ... More

Sigmund,K. (1984)

A Survey of Replicator Equations ... More

Sigmund,K. (1984)

The Maximum Principle for Replicator Equations ... More

Demetrius,L. Schuster,P. Sigmund,K. (1984)

Polynucleotide Evolution and Branching Processes ... More