Abstract
We consider economic decision problems under uncertainty consisting of choosing an optimal decisionX, so as to maximize to expected value of an objective function depending on a stochastic parameterp. The paper establishes an optimal policy intervalXA ⩽X1 ⩽XB, where the boundsXA,XB are given in terms of simple parameters of the distribution ofp, in particular the meanμ, and the mean absolute deviationd=E ¦p−μ ¦. The convexity assumptions needed to establish such bounds are shown to hold naturally in some classical problems of production under uncertainty.
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