Heteroskedastic Proxy Vector Autoregressions: Testing for Time-Varying Impulse Responses in the Presence of Multiple Proxies

Martin Bruns and Helmut Lütkepohl

No 2005, Discussion Papers of DIW Berlin from DIW Berlin, German Institute for Economic Research

Abstract: We propose a test for time-varying impulse responses in heteroskedastic structural vector autoregressions that can be used when the shocks are identified by external proxy variables as a group. The test can be used even if the shocks are not identified individually. The asymptotic analysis is supported by small sample simulations which show good properties of the test. An investigation of the impact of productivity shocks in a small macroeconomic model for the U.S. illustrates the importance of the issue for empirical work.

Keywords: Structural vector autoregression; proxy VAR; heteroskedasticity; productivity shocks (search for similar items in EconPapers)
JEL-codes: C32 (search for similar items in EconPapers)
Pages: 39 , Anh. p.
Date: 2022
New Economics Papers: this item is included in nep-ecm, nep-ets and nep-mac
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Citations: View citations in EconPapers (1)

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Related works:
Working Paper: Heteroskedastic Proxy Vector Autoregressions: Testing for Time-Varying Impulse Responses in the Presence of Multiple Proxies (2022)
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