Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/264937 
Year of Publication: 
2021
Series/Report no.: 
Working Paper No. 18/2021
Publisher: 
Norges Bank, Oslo
Abstract: 
Dynamic equilibrium models are specifted to track time series with unit root-like behavior. Thus, unit roots are typically introduced and the optimality conditions adjusted. This step requires tedious algebra and often leads to algebraic mistakes, especially in models with several unit roots. We propose a symbolic algorithm that simpliftes the step of rendering non-stationary models stationary. It is easy to implement and works when trends are stochastic or deterministic, exogenous or endogenous. Three examples illustrate the mechanics and the properties of the approach. A comparison with existing methods is provided.
Subjects: 
DSGE models
unit roots
endogenous growth
symbolic computation
Persistent Identifier of the first edition: 
ISBN: 
978-82-8379-217-1
Creative Commons License: 
cc-by-nc-nd Logo
Document Type: 
Working Paper
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