Implications of factor-based asset pricing models for estimation of expected returns and for portfolio selection are investigated. In the presence of model mispricing due to a missing risk factor, the mispricing and the residual covariance matrix are linked together. Imposing a strong form of...

This paper solves the equilibrium problem in a pure-exchange, continuous-time economy in which some agents face information costs or other types of frictions effectively preventing them from investing in the stock market. Under the assumption that the restricted agents have logarithmic...

Implications of factor-based asset pricing models for estimation of expecte d returns and for portfolio selection are investigated. In the presence of model mispricing due to a missing factor, the mispricing and the residual covariance matrix are linked together. Imposing a strong form of this...