The emergence of risk aversion

Economic decision making under uncertainty is universally characterized by aversion to risk. One of the most basic concepts in economic theory, risk aversion is usually explained by the concavity of the utility function, which, in turn, is based on a person’s satiability for wealth. I use genetic algorithms to show that risk aversion, and some related consequences, emerge naturally as a result of evolutionary pressures. In analogy to the well-known hillclimbing metaphor, it is helpful in this context to characterize optimizing under uncertainty as “surfing in a fitness seascape.” ©1997 John Wiley & Sons, Inc.

[1]  John H. Holland,et al.  Adaptation in Natural and Artificial Systems: An Introductory Analysis with Applications to Biology, Control, and Artificial Intelligence , 1992 .

[2]  G. Fechner.  Elemente der Psychophysik , 1998 .

[3]  S S Stevens,et al.  On the Theory of Scales of Measurement. , 1946, Science.

[4]  Jasmina Arifovic.  Genetic algorithm learning and the cobweb model , 1994 .

[5]  J. Pratt.  RISK AVERSION IN THE SMALL AND IN THE LARGE11This research was supported by the National Science Foundation (grant NSF-G24035). Reproduction in whole or in part is permitted for any purpose of the United States Government. , 1964 .

[6]  Vidroha Debroy,et al.  Genetic Programming , 1998, Lecture Notes in Computer Science.

[7]  S. S. Stevens.  On the psychophysical law. , 1957, Psychological review.

[8]  K. Arrow,et al.  Aspects of the theory of risk-bearing , 1966 .

[9]  J. Neumann,et al.  Theory of games and economic behavior , 1945, 100 Years of Math Milestones.

[10]  George G. Szpiro.  Measuring Risk Aversion: An Alternative Approach , 1986 .

[11]  J. Holland,et al.  Artificial Adaptive Agents in Economic Theory , 1991 .

[12]  George G. Szpiro.  Forecasting chaotic time series with genetic algorithms , 1997 .

[13]  Insurance buying gamblers , 1992 .

[14]  A. Tversky,et al.  Judgment under Uncertainty: Heuristics and Biases , 1974, Science.

[15]  M. Herskovits.  Economic Anthropology: The Economic Life of Primitive Peoples , 1965 .

[16]  L. J. Savage,et al.  The Utility Analysis of Choices Involving Risk , 1948, Journal of Political Economy.

[17]  R. Palmer,et al.  Artificial economic life: a simple model of a stockmarket , 1994 .

[18]  W. Arthur.  Designing Economic Agents that Act Like Human Agents: A Behavioral Approach to Bounded Rationality , 1991 .