Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/56731 
Year of Publication: 
2011
Series/Report no.: 
SFB 649 Discussion Paper No. 2011-087
Publisher: 
Humboldt University of Berlin, Collaborative Research Center 649 - Economic Risk, Berlin
Abstract: 
We introduce a nonlinear infinite moving average as an alternative to the standard state-space policy function for solving nonlinear DSGE models. Perturbation of the nonlinear moving average policy function provides a direct mapping from a history of innovations to endogenous variables, decomposes the contributions from individual orders of uncertainty and nonlinearity, and enables familiar impulse response analysis in nonlinear settings. When the linear approximation is saddle stable and free of unit roots, higher order terms are likewise saddle stable and first order corrections for uncertainty are zero. We derive the third order approximation explicitly and examine the accuracy of the method using Euler equation tests.
Subjects: 
perturbation
nonlinear impulse response
DSGE
solution methods
JEL: 
C61
C63
E17
Document Type: 
Working Paper

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