Eric Ghysels

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Staff Working Papers

On Portfolio Separation Theorems with Heterogeneous Beliefs and Attitudes towards Risk

Staff Working Paper 2008-16 Fousseni Chabi-Yo, Eric Ghysels, Eric Renault
The early work of Tobin (1958) showed that portfolio allocation decisions can be reduced to a two stage process: first decide the relative allocation of assets across the risky assets, and second decide how to divide total wealth between the risky assets and the safe asset. This so called twofund separation relies on special assumptions on either returns or preferences.

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