Graduate School of Economics
2-1 Naka, Kunitachi, Tokyo
NBER Working Papers and Publications
|August 2018||Discouraging Deviant Behavior in Monetary Economics|
with Lawrence Christiano: w24949
We consider a model in which monetary policy is governed by a Taylor rule. The model has a unique equilibrium near the steady state, but also has other equilibria. The introduction of a particular escape clause into monetary policy works like the Taylor principle to exclude the other equilibria. We reconcile our finding about the escape clause with the sharply different conclusion reached in Cochrane (2011). Atkeson et al. (2010) study a different version of the escape clause policy, but that version is fragile in that it lacks a crucial robustness property.
|December 2014||Universal Gravity|
with Treb Allen, Costas Arkolakis: w20787
What is the best way to reduce trade frictions when resources are scarce? To answer this question, we develop a framework that nests previous general equilibrium gravity models and show that the macro-economic implications of these various models depend crucially on two key model parameters, which we term the “gravity constants.” Based only on the value of the gravity constants, we derive sufficient conditions for the existence and uniqueness of the trade equilibrium and, given observed trade flows, completely characterize all comparative statics for any change in bilateral trade frictions. We then develop a methodology for estimating these gravity constants without needing to assume a particular micro-foundation of the gravity trade model. Finally, we use these results to derive the set o...