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The Friedman Rule in the Laboratory

John Duffy () and Daniela Puzzello ()

No 541, 2019 Meeting Papers from Society for Economic Dynamics

Abstract: We explore the celebrated Friedman rule for optimal monetary policy in the context of a laboratory economy based on the Lagos-Wright model. The rule that Friedman proposed can be shown to be optimal in a wide variety of different monetary models, including the Lagos-Wright model. However, we are not aware of any prior empirical evidence evaluating the welfare consequences of the Friedman rule. We explore two implementations of the Friedman rule in the laboratory. The first is based on a deflationary monetary policy where the money supply contracts to offset time discounting. The second implementation pays interest on money removing the private marginal cost from holding money. We explore the welfare consequences of these two theoretically equivalent implementations of the Friedman Rule and compare results with two other policy regimes, a constant money supply regime and another regime advocated by Friedman, where the supply of money grows at a constant k-percent rate. We find that, counter to theory, the Friedman rule is not welfare improving, performing no better than a constant money regime. By one welfare measure, we find that the k-percent money growth rate regime performs best.

Date: 2019
New Economics Papers: this item is included in nep-cba, nep-dge, nep-mac and nep-mon
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