Abstract
In this paper we propose a unifying approach to the study of optimal growth models with bounded or unbounded returns (above–below). Following our approach, we prove the existence of optimal solutions and show, without using the contraction method, that the value function is the unique solution to the Bellman equation for a particular class of functions. The value function can be obtained by the usual algorithm defined by the operator provided by the Bellman equation. Moreover, following our approach we obtain the recent results of F. Alvarez and N. Stokey (1998, J. Econ. Theory82, 167–189) as well as the well-known results. Journal of Economic Literature Classification numbers: C61, 041.
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