Reflections on “Testing for Unit Roots in Heterogeneous Panels"

Yongcheol Shin, M. Hashem Pesaran, Kyung So Im

Research output: Contribution to journalArticlepeer-review


This article is our personal perspective on the IPS test and the subsequent developmentsof unit root and cointegration tests in dynamic panels with and without cross-sectiondependence. In this note, we discuss the main idea behind the test and the publicationprocess that led to Im et al. (2003).
Original languageEnglish
Number of pages4
JournalJournal of Econometrics
Publication statusPublished - 12 Jan 2023


  • Dickey and Fuller statistic
  • Stationarity
  • panel unit root tests
  • prevalence of unit roots

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