Abstract
In a dynamic context a decision maker at any instant t has information about his exogenous economic environment both at time t and at later dates. We represent the environment at t by a vector x(t) of exogenous variables, and their future values by \( \left(x\left(t+1\right),x\left(t+2\right),\dots, x\left(t+T\right)\right) \). The horizon T is determined by such considerations as length of life, technology, resource limitations etc.; it might be infinite. A decision rule at time t is a map ψt associating with a vector of variables z the variable d representing the choice of the decision maker. We write \( d={\psi}_t(z) \). Myopic decision rules refer to those maps of the form \( d(t)={\psi}_t\left(x(t)\right) \) in which d(t) depends only upon the values of the exogenous variables at time t, disregarding any information about future conditions of the economic environment. A decision rule is said to be non-myopic if it is of the form \( d(t)={\psi}_t\left(x(t),x\left(t=1\right),\dots, x\left(t+T\right)\right) \).
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Kurz, M. (2018). Myopic Decision Rules. In: The New Palgrave Dictionary of Economics. Palgrave Macmillan, London. https://doi.org/10.1057/978-1-349-95189-5_1261
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DOI: https://doi.org/10.1057/978-1-349-95189-5_1261
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