We derive marginal conditions of optimality (i.e., Euler equations) for a general class of Dynamic Discrete Choice ( DDC ) structural models. These conditions can be used to estimate structural parameters in these models without having to solve for approximate value functions. This result...

The standard envelope theorems apply to choice sets with convex and topological structure, providing sufficient conditions for the value function to be differentiable in a parameter and characterizing its derivative. This paper studies optimization with arbitrary choice sets and shows that the...