How Robust is the Equal Split Norm? Responsive Strategies, Selection Mechanisms and the Need for Economic Interpretation of Simulation Parameters

Herbert Dawid and Joern Dermietzel

Computational Economics, 2006, vol. 28, issue 4, 397 pages

Abstract: In this paper the evolution of bargaining behavior is studied under the assumption that individuals might choose between obstinate and responsive strategies. Following Ellingson (1997) it is assumed that obstinate agents commit to a certain demand, whereas responsive agents adapt optimally to their opponents strategy. Agents change strategies due to imitation based on observations of the success of other individuals. An agent-based model, where the updating of the population profile is governed by tournament selection and mutation, is used to describe the evolution of behavior. In contrast to existing local and stochastic stability results, which predict robust convergence to an equal split norm in this and related frameworks, the simulations show persistent episodes of substantial deviation of behavior from the equal split. Furthermore, it is shown that parameters governing frequency and type of updating as well as selection pressure have significant impact on the qualitative features of the simulation results. This shows the importance of being able to attach economic interpretations to changes in these parameter values. Copyright Springer Science+Business Media, Inc. 2006

Keywords: bargaining; Nash demand game; equal-split norm; evolutionary algorithm; agent-based simulation (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1007/s10614-006-9040-8

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