Testing for changes in autocovariances of nonparametric time series models

Xiaoye Li, Zhibiao Zhao

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


In the literature on change-point analysis, much attention has been paid to detecting changes in certain marginal characteristics, such as mean, variance, and marginal distribution. For time series data with nonparametric time trend, we study the change-point problem for the autocovariance structure of the unobservable error process. To derive the asymptotic distribution of the cumulative sum test statistic, we develop substantial theory for uniform convergence of weighted partial sums and weighted quadratic forms. Our asymptotic results improve upon existing works in several important aspects. The performance of the test statistic is examined through simulations and an application to interest rates data.

Original languageEnglish (US)
Pages (from-to)237-250
Number of pages14
JournalJournal of Statistical Planning and Inference
Issue number2
StatePublished - Feb 2013

All Science Journal Classification (ASJC) codes

  • Statistics and Probability
  • Statistics, Probability and Uncertainty
  • Applied Mathematics


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