Santos, Manuel S.Universidad Carlos III de Madrid. Departamento de EconomÃa2008-07-212008-07-211991-022340-5031https://hdl.handle.net/10016/2763In this paper, I consider a general class of continuous-time economic models with unbounded horizon. I study the sets of conditions under which the policy function is continuous, Lipschitz continuous, and Cl differentiable. 1 also single out certain postulates which may prevent higher-order differentiability. The analysis provides, therefore, a fmn foundation to the use of dynamic programming methods in continuous time models with unbounded horizonapplication/pdfengPolicy FunctionsContinuous Time ModelsContinuityLipschitz ContinuityDifferentiabilityOn the policy function in continuos time economic modelsworking paperEconomÃaopen access