TAILIEUCHUNG - báo cáo khoa học: "Portfolio theory, utility theory and mate selection"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Portfolio theory, utility theory and mate selection | Génét. Sél. Evol. 1987 19 3 321-336 Portfolio theory utility theory and mate selection . SMITH and K. HAMMOND Animal Genetics and Breeding Unit University of New England Armidale NSW 2351 Australia Summary A decision rule is said to be rational if it is consistent with maximising expected utility. Rational decision rules can correctly accommodate objective and subjective criteria. It is shown that portfolio theory as applied to she selection problems is rational. However the underlying utility function must be linear or exponential and normality assumptions must hold. Explicit use of utility theory and related Bayesian methodology is suggested for other selection problems. A mate selection rule is described which is rational and consistent with the underlying reason for positive assortative mating to arrange future pedigree information by attempting to create extreme positive individuals. The mate selection rule can be evaluated sequentially using mixed model methodology as this provides for the reuse of information on preassorted relatives. Key words Bayesian methods portfolio theory positive assortative mating mate selection utility theory. Resume Théorie du portfolio théorie de 1 utilité choix et accouplement des reproducteurs Une regie de decision est dite rationnelle si elle est cohérente avec la maximisation de 1 espérance de 1 utilité. Des règles de decision rationnelles peuvent en toute rigueur intégrer des critères objectifs et des critères subjectifs. On montre que la théorie du portfolio appliquée aux problèmes de selection et d accouplement des reproducteurs est rationnelle. Cependant il faut que la fonction d utilite sous-jacente soit linéaire OU exponentielle et que les hypotheses de normalité soient véritiées. L utilisation explicite de la théorie de l utilité et de la méthõdologie bayésienne est suggérée pour aborder d autres problèmes de sélection. On décrit une regie de sélection et d accouplement des reproducteurs qui est rationnelle et .

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