Mathematics for Economists

(Greg DeLong) #1

InÖnite dynamic programming


Theorem


Under the above conditions there is a stationary optimal strategyπ.The
value function solves the Bellman equation:

V(s)= max
a 2 Φ(s)

(r(s,a)+βV(f(s,a))).

As r is bounded the value function is also bounded and if a bounded
function solves the equation then it is the value function of the problem.

DeÖnition


A Markovian strategy is stationary if it is independent of the time
parametert.
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