This paper develops a method to compute the equilibrium correspondence for exchangeeconomies with semi-algebraic preferences. Given a class of semi-algebraic exchange economiesparameterized by individual endowments and possibly other exogenous variables such as prefer-ence parameters or asset...

Multiplicity of equilibria is a prevalent problem in many economic models. Oftenequilibria are characterized as solutions to a system of polynomial equations. This pa-per gives an introduction to the application of GrÄobner basis methods for ¯nding allsolutions of a polynomial system. The...

This paper examines portfolios within the framework of a dynamic asset-pricingmodel when investors can trade equity assets as well as bonds of many different matu-rities. We specify the model so that investors have demand for both a risky and a safeincome stream. We characterize the resulting...