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Identifying Common Trend Determinants in Panel Data

Author

Listed:
  • Yoonseok Lee

    (Syracuse University)

  • Peter C. B. Phillips

    (Yale University, University of Auckland, and Singapore Management University)

  • Suyong Song

    (University of Iowa)

  • Donggyu Sul

    (University of Texas at Dallas)

Abstract

This paper develops a novel method for identifying observable determinants of latent common trends in nonstationary panel data, which are typically removed or controlled in two-way fixed effects regressions. By examining cross sectional dispersion processes, we assess whether panel series exhibit distributional convergence toward specific observed time series, revealing them as long run determinants of the underlying latent trend. The approach also offers a new perspective on cointegration between time series and panel data, focusing on the relative variation of the panel data with respect to the cointegration error. Applying this method to U.S. state-level crime rates demonstrates that the percentage of young adults is a key determinant of violent crime trends, while the incarceration rate drives property crime trends. These findings, which differ from standard two-way fixed effects analysis results, provide a compelling explanation for the sharp decline in U.S. crime rates since the early 1990s.

Suggested Citation

  • Yoonseok Lee & Peter C. B. Phillips & Suyong Song & Donggyu Sul, 2026. "Identifying Common Trend Determinants in Panel Data," Cowles Foundation Discussion Papers 2504, Cowles Foundation for Research in Economics, Yale University.
    • Handle: RePEc:cwl:cwldpp:2504
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    File URL: https://cowles.yale.edu/sites/default/files/2026-03/d2504.pdf
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