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Computing Markov-Perfect Optimal Policies in Business-Cycle Models

Richard Dennis () and Tatiana Kirsanova

No 2015-64, SIRE Discussion Papers from Scottish Institute for Research in Economics (SIRE)

Abstract: Time-inconsistency is an essential feature of many policy problems (Kydland and Prescott, 1977). This paper presents and compares three methods for computing Markov-perfect optimal policies in stochastic nonlinear business cycle models. The methods considered include value function iteration, generalized Euler-equations, and parameterized shadow prices. In the context of a business cycle model in which a scal authority chooses government spending and income taxation optimally, while lacking the ability to commit, we show that the solutions obtained using value function iteration and generalized Euler equations are somewhat more accurate than that obtained using parameterized shadow prices. Among these three methods, we show that value function iteration can be applied easily, even to environments that include a risk-sensitive scal authority and/or inequality constraints on government spending. We show that the risk-sensitive scal authority lowers government spending and income-taxation, reducing the disincentive households face to accumulate wealth.

Keywords: Markov-Perfect Policy; Time-Consistency; Fiscal Policy (search for similar items in EconPapers)
Date: 2014-11
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