Unit roots and structural breaks: a survey of the literature

J.P. Byrne, R. Perman, B. Bhaskara Rao (Editor)

Research output: Chapter in Book/Report/Conference proceedingChapter


Since Perron (1989) the time series literature has emphasised the importance of testing for structural breaks in typical economic data sets and pronounced the implications of structural breaks when testing for unit root processes. In this paper we survey recent developments in testing for unit roots taking account of possible structural breaks. In doing so we discuss the distinction between taking structural break dates as exogenously determined, an approach initially adopted in the literature, and endogenously testing break dates. That is, we differentiate between testing for breaks when the break date is known and when it is assumed to be unknown. Also important is the distinction between discrete breaks and gradual breaks. Additionally we describe tests for both single and multiple breaks and discuss some of the pitfalls of the latter.
Original languageEnglish
Title of host publicationCointegration for the Applied Economist
Place of PublicationBasingstoke
PublisherPalgrave Macmillan Ltd.
Number of pages280
Edition2nd edition
ISBN (Print)9781403996145
Publication statusPublished - 24 Aug 2007


  • unit root
  • structural breaks
  • endogenous breaks
  • gradual breaks
  • multiple breaks


Dive into the research topics of 'Unit roots and structural breaks: a survey of the literature'. Together they form a unique fingerprint.

Cite this