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The Hidden Cost of Pollen: Empirical Analysis of the Association Between Pollen Exposure and Mental Health

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  • Mamiko Kishida
  • Akira Hibiki

Abstract

This study examines the association between pollen exposure and monthly suicide mortality in Japan. It combines prefecture-level daily pollen counts with monthly suicide mortality data for 2009-2020 and estimates panel models with prefecture and year-by-month fixed effects. The estimates indicate that additional high-pollen days are positively associated with overall suicide mortality. The association is statistically significant in several specifications for women, although the female-specific estimates are sensitive to model specification and the difference between women and men is not directly tested. Results from the pollen-season sample support the main overall association. Because the estimated relationship is not monotonic across pollen categories and the age-specific analysis entails multiple testing, the heterogeneity and mechanism results should be viewed as exploratory.

Suggested Citation

  • Mamiko Kishida & Akira Hibiki, 2026. "The Hidden Cost of Pollen: Empirical Analysis of the Association Between Pollen Exposure and Mental Health," TUPD Discussion Papers 87, Graduate School of Economics and Management, Tohoku University.
    • Handle: RePEc:toh:tupdaa:87
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    File URL: https://hdl.handle.net/10097/0002008487
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