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...

We study the dynamic equilibrium behavior of security prices in an economy where nonfundamental risk arises from agents' heterogeneous beliefs about extraneous processes. We provide a complete characteriszation of equilibrium in terms of the primitives of the economy, via construction of a...