A conditional-heteroskedasticity-robust confidence interval for the autoregressive parameter

Donald W.K. Andrews, Patrik Guggenberger

Research output: Contribution to journalComment/debatepeer-review

10 Scopus citations

Abstract

This paper introduces a new confidence interval (CI) for the autoregressive parameter (AR) in an AR(1) model that allows for conditional heteroskedasticity of a general form and AR parameters that are less than or equal to unity. The CI is a modification of Mikusheva's (2007a) modification of Stock's (1991) CI that employs the least squares estimator and a heteroskedasticity-robust variance estimator. The CI is shown to have correct asymptotic size and to be asymptotically similar (in a uniform sense). It does not require any tuning parameters. No existing procedures have these properties. Monte Carlo simulations show that the CI performs well in finite samples in terms of coverage probability and average length, for innovations with and without conditional heteroskedasticity.

Original languageEnglish (US)
Pages (from-to)376-381
Number of pages6
JournalReview of Economics and Statistics
Volume96
Issue number2
DOIs
StatePublished - May 2014

All Science Journal Classification (ASJC) codes

  • Social Sciences (miscellaneous)
  • Economics and Econometrics

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