IDEAS home Printed from https://ideas.repec.org/a/cup/polals/v18y2010i02p189-205_01.html
   My bibliography  Save this article

Proportionally Difficult: Testing for Nonproportional Hazards in Cox Models

Author

Listed:
  • Keele, Luke

Abstract

The Cox proportional hazards model is widely used to model durations in the social sciences. Although this model allows analysts to forgo choices about the form of the hazard, it demands careful attention to the proportional hazards assumption. To this end, a standard diagnostic method has been developed to test this assumption. I argue that the standard test for nonproportional hazards has been misunderstood in current practice. This test detects a variety of specification errors, and these specification errors must be corrected before one can correctly diagnose nonproportionality. In particular, unmodeled nonlinearity can appear as a violation of the proportional hazard assumption for the Cox model. Using both simulation and empirical examples, I demonstrate how an analyst might be led astray by incorrectly applying the nonproportionality test.

Suggested Citation

  • Keele, Luke, 2010. "Proportionally Difficult: Testing for Nonproportional Hazards in Cox Models," Political Analysis, Cambridge University Press, vol. 18(2), pages 189-205, April.
    • Handle: RePEc:cup:polals:v:18:y:2010:i:02:p:189-205_01
    as

    Download full text from publisher

    File URL: https://www.cambridge.org/core/product/identifier/S1047198700012407/type/journal_article
    File Function: link to article abstract page
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Mihailo Radoman & Marcel C. Voia, 2015. "Youth Training Programs and Their Impact on Career and Spell Duration of Professional Soccer Players," LABOUR, CEIS, vol. 29(2), pages 163-193, June.
    2. Enrico Borghetto & Lars Mäder, 2014. "EU law revisions and legislative drift," European Union Politics, , vol. 15(2), pages 171-191, June.
    3. Gandrud, Christopher, 2015. "simPH: An R Package for Illustrating Estimates from Cox Proportional Hazard Models Including for Interactive and Nonlinear Effects," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 65(i03).
    4. 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.
    5. Amanda A Licht, 2022. "Introducing Regular Turnover Details, 1960–2015: A dataset on world leaders’ legal removal from office," Journal of Peace Research, Peace Research Institute Oslo, vol. 59(2), pages 277-285, March.
    6. Anne Rasmussen & Dimiter Toshkov, 2013. "The effect of stakeholder involvement on legislative duration: Consultation of external actors and legislative duration in the European Union," European Union Politics, , vol. 14(3), pages 366-387, September.
    7. Mihailo Radoman, 2017. "Labor Market Implications of Institutional Changes in European Football," Journal of Sports Economics, , vol. 18(7), pages 651-672, October.
    8. Kotorri Mrika, 2017. "The probability of return conditional on migration duration: evidence from Kosovo," South East European Journal of Economics and Business, Sciendo, vol. 12(2), pages 35-46, December.
    9. Richard J Saunders, 2023. "A certain gamble: Institutional change, leader turnover, and their effect on rivalry termination," Conflict Management and Peace Science, Peace Science Society (International), vol. 40(3), pages 281-303, May.
    10. Gwangsu Kim & Yongdai Kim & Taeryon Choi, 2017. "Bayesian Analysis of the Proportional Hazards Model with Time-Varying Coefficients," Scandinavian Journal of Statistics, Danish Society for Theoretical Statistics;Finnish Statistical Society;Norwegian Statistical Association;Swedish Statistical Association, vol. 44(2), pages 524-544, June.
    11. Fazeer Rahim, 2014. "Work-family attitudes and career interruptions due to childbirth," Review of Economics of the Household, Springer, vol. 12(1), pages 177-205, March.
    12. Nazha Gali & Mathew (Mat) Hughes & Robert E. Morgan & Catherine L. Wang, 2024. "Entrepreneurial Entropy: A Resource Exhaustion Theory of Firm Failure From Entrepreneurial Orientation," Entrepreneurship Theory and Practice, , vol. 48(1), pages 141-170, January.
    13. 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.
    14. Antenangeli Leonardo & Cantú Francisco, 2019. "Right on Time: An Electoral Audit for the Publication of Vote Results," Statistics, Politics and Policy, De Gruyter, vol. 10(2), pages 137-186, December.
    15. Baccini, Leonardo, 2014. "Cheap talk: transaction costs, quality of institutions, and trade agreements," LSE Research Online Documents on Economics 44923, London School of Economics and Political Science, LSE Library.
    16. Allan Dafoe, 2018. "Nonparametric Identification of Causal Effects under Temporal Dependence," Sociological Methods & Research, , vol. 47(2), pages 136-168, March.
    17. Giorgia Giovannetti & Margherita Velucchi, 2022. "Gender discrimination and firm survival: a multilevel approach for EU textile companies," SN Business & Economics, Springer, vol. 2(9), pages 1-19, September.
    18. Mourao, Paulo Reis, 2018. "Surviving in the shadows—An economic and empirical discussion about the survival of the non-winning F1 drivers," Economic Analysis and Policy, Elsevier, vol. 59(C), pages 54-68.
    19. Paulo Reis Mourao & Alina Irina Popescu, 2021. "Discussing the political survival of Romanian ministers since 1989—Do economic conditions matter?," Economics of Transition and Institutional Change, John Wiley & Sons, vol. 29(1), pages 63-93, January.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:cup:polals:v:18:y:2010:i:02:p:189-205_01. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Kirk Stebbing (email available below). General contact details of provider: https://www.cambridge.org/pan .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.