This paper describes a Monte Carlo procedure to assess the performance
of calibrated dynamic general equilibrium models. The procedure forma
lizes the choice of parameters and the evaluation of the model and pro
vides an efficient way to conduct a sensitivity analysis for perturbat
ions of the parameters within a reasonable range. As an illustration t
he methodology is applied to two problems: the equity premium puzzle a
nd how much of the variance of actual US output is explained by a real
business cycle model.