Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/61422
Authors: 
Lütkepohl, Helmut
Netsunajev, Aleksei
Year of Publication: 
2012
Series/Report no.: 
DIW Discussion Papers 1195
Abstract: 
Given the growing dissatisfaction with exclusion and long-run restrictions in structural vector autoregressive analysis, sign restrictions are becoming increasingly popular. So far there are no techniques for validating the shocks identified via such restrictions. Although in an ideal setting the sign restrictions specify shocks of interest, sign restrictions may be invalidated by measurement errors, data adjustments or omitted variables. We model changes in the volatility of the shocks via a Markov switching (MS) mechanism and use this devise to give the data a chance to object to sign restrictions. The approach is illustrated by considering a small model for the market of crude oil.
Subjects: 
Markov switching model
vector autoregression
heteroskedasticity
rude oil market
JEL: 
C32
Q43
Document Type: 
Working Paper

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