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      Biological signals as handicaps

      Journal of Theoretical Biology

      Elsevier BV

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          Abstract

          An ESS model of Zahavi's handicap principle is constructed. This allows a formal exposition of how the handicap principle works, and shows that its essential elements are strategic. The handicap model is about signalling, and it is proved under fairly general conditions that if the handicap principle's conditions are met, then an evolutionarily stable signalling equilibrium exists in a biological signalling system, and that any signalling equilibrium satisfies the conditions of the handicap principle. Zahavi's major claims for the handicap principle are thus vindicated. The place of cheating is discussed in view of the honesty that follows from the handicap principle. Parallel signalling models in economics are discussed. Interpretations of the handicap principle are compared. The models are not fully explicit about how females use information about male quality, and, less seriously, have no genetics. A companion paper remedies both defects in a model of the handicap principle at work in sexual selection.

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          Author and article information

          Journal
          Journal of Theoretical Biology
          Journal of Theoretical Biology
          Elsevier BV
          00225193
          June 1990
          June 1990
          : 144
          : 4
          : 517-546
          Article
          10.1016/S0022-5193(05)80088-8
          2402153
          © 1990

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