The Hybrid Model and Related Approaches to Capital Market Equilibria

  • Günter Bamberg


Single period capital-asset-pricing models provide a number of implications on capital market equilibria. Familiar notions as, for instance, the market price of risk or the market portfolio can be derived from the equilibrium conditions without having explicit representations of the equilibrium prices. However, such explicit solutions are required to conduct other investigations successfully. The availability of explicit solutions facilitates the analysis of changes in the value of firms under a variety of circumstances. The paper concentrates on the chances to obtain explicit solutions. It makes precise in which sense the hybrid model, characterized by multivariate normally distributed returns and constant risk aversion of the investors, is the most convenient model of capital market equilibrium. Some applications are surveyed concerning taxes, heterogeneous expectations, short sales restrictions, and imperfect capital markets.


Risk Aversion Hybrid Model Equilibrium Price Optimal Portfolio Risky Asset 
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  • Günter Bamberg

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