Comparison of local projection estimators for proxy vector autoregressions

Martin Bruns, Helmut Luetkepohl

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Different local projection (LP) estimators for structural impulse responses of proxy vector autoregressions are reviewed and compared algebraically and with respect to their small sample suitability for inference. Conditions for numerical equivalence and similarities of some estimators are provided. Two generalized least squares (GLS) projection estimators are found to be more accurate than the other LP estimators in small samples. In particular, a lag-augmented GLS estimator tends to be superior to its competitors and to perform as well as a standard VAR estimator for sufficiently large samples.

Original languageEnglish
Article number104277
JournalJournal of Economic Dynamics and Control
Early online date29 Nov 2021
Publication statusPublished - Jan 2022


  • Impulse responses
  • Instrumental variable
  • Local projection
  • Structural vector autoregression

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