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Change Comes with Time: Substantive Interpretation of Nonproportional Hazards in Event History Analysis

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  • Licht, Amanda A.

Abstract

Although methodologists have provided us ample notice of both the problem of nonproportional hazards (NPHs) and the means of correcting for them, less attention has been paid to the postestimation interpretation. The suggested inclusion of time interactions in our models is more than a statistical fix: These corrections alter the substantive meaning and interpretation of results. Framing the issue as a specific case of multiplicative-interaction modeling, I provide detailed discussion of the problem of NPHs and present several appropriate means of interpreting both the substantive impact and the significance of variables whose effects may change over time.

Suggested Citation

  • Licht, Amanda A., 2011. "Change Comes with Time: Substantive Interpretation of Nonproportional Hazards in Event History Analysis," Political Analysis, Cambridge University Press, vol. 19(2), pages 227-243, April.
    • Handle: RePEc:cup:polals:v:19:y:2011:i:02:p:227-243_01
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    Cited by:

    1. Maekawa Wakako, 2021. "Strategic Territorial Power-Sharing and Multi-Party Bargaining in Civil Wars," Peace Economics, Peace Science, and Public Policy, De Gruyter, vol. 27(1), pages 91-117, February.
    2. Thomas König & Lars Mäder, 2013. "Non-conformable, partial and conformable transposition: A competing risk analysis of the transposition process of directives in the EU15," European Union Politics, , vol. 14(1), pages 46-69, March.
    3. Krista Wiegand & Eric Keels, 2019. "Oil Wealth, Winning Coalitions, and Duration of Civil Wars," Journal of Conflict Resolution, Peace Science Society (International), vol. 63(4), pages 1077-1105, April.
    4. Christina L. Davis & Tyler Pratt, 2021. "The forces of attraction: How security interests shape membership in economic institutions," The Review of International Organizations, Springer, vol. 16(4), pages 903-929, October.
    5. Tansey, Oisin & Koehler, Kevin & Schmotz, Alexander, 2017. "Ties to the rest: autocratic linkages and regime survival," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 50(9), pages 1221-1254.
    6. David S Siroky & Milos Popovic & Nikola Mirilovic, 2021. "Unilateral secession, international recognition, and great power contestation," Journal of Peace Research, Peace Research Institute Oslo, vol. 58(5), pages 1049-1067, September.
    7. Aziz Z. Huq, 2016. "The Predicates of Military Detention at Guantánamo: The Role of Individual Acts and Affiliations," Journal of Empirical Legal Studies, John Wiley & Sons, vol. 13(4), pages 567-602, December.
    8. Armin Mertens & Christine Trampusch & Florian Fastenrath & Rebecca Wangemann, 2021. "The political economy of local government financialization and the role of policy diffusion," Regulation & Governance, John Wiley & Sons, vol. 15(2), pages 370-387, April.
    9. Yuleng Zeng, 2021. "Biding time versus timely retreat: Asymmetric dependence, issue salience, and conflict duration," Journal of Peace Research, Peace Research Institute Oslo, vol. 58(4), pages 719-733, July.
    10. Shawna K. Metzger, 2017. "Time is on my side? The impact of timing and dispute type on militarized conflict duration," Conflict Management and Peace Science, Peace Science Society (International), vol. 34(3), pages 308-329, May.
    11. Corinne Bara, 2018. "Legacies of Violence," Journal of Conflict Resolution, Peace Science Society (International), vol. 62(9), pages 1991-2016, October.
    12. Kirssa Cline Ryckman, 2020. "Lasting peace or temporary calm? Rebel group decapitation and civil war outcomes," Conflict Management and Peace Science, Peace Science Society (International), vol. 37(2), pages 172-192, March.

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