Roos van der Haer
Roos van der Haer is an assistant professor of International Relations at the Institute of Political Science.
Her current research focuses on the empirical examination of the causes and consequences of child soldiering, recruitment strategies of rebel groups, psychological consequences of conflict participation, quantitative survey research (especially in conflict settings), and more broadly, micro level conflict research. Her work has been published, among others, in the Journal of European International Relations, Conflict Management and Peace Science, Aggressive Behavior, International Journal of Behavioral Development, and Survey Methodology. She has conducted field research in the DRC, Mali, Namibia, Rwanda, Tanzania, and Uganda.
Roos received her PhD from the University of Konstanz (Germany) in 2012, and prior to that studied at the University of Leiden and the University of Manchester.
Roos van der Haer is available to supervise PhD students and invites PhD research proposals in the areas of:
- civil wars
- children and youth in conflict and post-conflict societies
- rebel groups and their recruitment strategies
See for more information on PhD positions:
- Haer R., Vüllers J. & Weidmann N.B. (2019), Studying micro dynamics in civil wars: introduction, Zeitschrift für Friedens- und Konfliktforschung 8(2): 151-159.
- Haer R. & Hecker T. (2019), Recruiting Refugees for Militarization: The Determinants of Mobilization Attempts, Journal of Refugee Studies 23(1): 1-22.
- Haer R. van der (2019), Children and armed conflict: looking at the future and learning from the past, Third World Quarterly 40(1): 74-91.
- Holzinger K., Haer R., Bayer A., Behr D. M. & Neupert-Wentz C. (2019), The Constitutionalization of Indigenous Group Rights, Traditional Political Institutions, and Customary Law., Comparative Political Studies 52(12): 1175-1809.
- Haer R, Faulkner C.M. & Whitaker B.E. (2019), Why Resource-Exploiting Rebels Are More Likely To Forcibly Recruit Children. Leiden Security and Global Affairs Blog. The Hague: Leiden University [blog entry].
- Haer R. & Boehmelt T. (2018), Girl soldiering in rebel groups, 1989–2013: Introducing a new dataset, Journal of Peace Research 55(3): 395-403.
- Schutte S. & Haer R. (2018), Research report: A software solution for rapid policy assessment with reimbursed SMS and mobile cash, International Journal of Social Research Methodology 21(6): 685-694.
- Haer R. & Böhmelt T. (2017), Could rebel child soldiers prolong civil wars?, Cooperation and Conflict 52(3): 332-359.
- Kibris A. & Haer R. (2017), Introduction to the Proceedings of the 17th Jan Tinbergen European Peace Science Conference, Peace Economics, Peace Science and Public Policy 23(4): 20170042.
- Haer R. (2017), The Study of Child Soldiering: Issues and Consequences for DDR Implementation, Third World Quarterly 38(2): 450-466.
- Behr D., Haer R. & Kromrey D. (2017), What is a chief without land? Impact of land reforms on power structures in Namibia. In: Erk J. (Ed.) Decentralization, Democracy, and Development in Africa. London: Routledge.
- Haer R., Hermenau K., Elbert T., Moran J.K, & Hecker T. (2017), The role of intrinsic and extrinsic rewards in committing violence during combat: A cross-sectional study with former combatants in the DR Congo, Aggressive Behavior 43(3): 241-250.
- Haer R. & Böhmelt T. (2016), Child soldiers as time bombs? Adolescents’ participation in rebel groups and the recurrence of armed conflict, European Journal of International Relations 22(2): 408-436.
- Meidert N., Meidert M. & Haer R. (2016), Die Umfrage ist anonym...Zur Formulierung von Datenschutzhinweise in wissenschaftlichen Onlineumfragen, Soziologie 45(5): 448-460.
- Haer R. (2016), Lost Generations? Consequences of and Responses to Child Soldier Recruitment. Sustainable Security. Oxford: Oxford Research Group [blog entry].
- Haer R. & Böhmelt T. (2016), The impact of child soldiers on rebel groups' fighting capacities, Conflict Management and Peace Science 33(2): 153-173.
- Haer R. (2016), Trafficking in Persons: The Use of Children in Armed Conflict. In: Heil E.C., Nichols A.J. (Eds.) Broadening the Scope of Human Trafficking. A Reader. Durham: Carolina Academic Press. 59-73.
- Haer R. (2015), Armed Group Structure and Violence in Civil Wars: The organizational dynamics of civilian killing. London: Routledge.
- Hecker T. & Haer R. (2015), Drugs Boosting Conflict? A Micro-Level Test of the Linkage between Substance Use and Violence, Terrorism and Political Violence 27(2): 205-224.
- Haer R., Hecker T. & Maedl A. (2015), Former Combatants on Sexual Violence during Warfare; A Comparative Study of the Perspectives of Perpetrators, Victimes, and Witnesses, Human Rights Quarterly 37(3).
- Haer R. & Kibris A. (2015), Introduction to the Proceedings of the 15th Jan Tinbergen European Peace Science Conference, Peace Economics, Peace Science and Public Policy 21(4): 1-7.
- Haer R. & Banholzer L. (2015), The Creation of Committed Combatants, Small Wars and Insurgencies 26(1): 25-48.
- Behr D., Haer R. & Kromrey D. (2015), What is a chief without land? Impact of land reforms on power structures in Namibia, Regional and Federal Studies 25(5): 455-472.
- Banholzer L. & Haer R. (2014), Group's Attachment and the Successful Reintegration of Child Soldiers, Journal of Development Effectiveness 6(2): 111-127.
- Haer R. & Meidert N. (2014), Undisclosed Privacy. The effect of privacy rights on response rates, Survey Practice 7(2): 1-10.
- Haer R., Banholzer L., Elbert T. & Weierstall R. (2013), Analyzing the Microfoundations of Human Violence in the DRC - Intrinsic and Extrinsic Rewards and the Prediction of Appetitive Aggression, Conflict and Health 7(11): e11.
- Weierstall R., Haer R., Banholzer L. & Elbert T. (2013), Becoming cruel - appetitive aggression released by detrimental socialisation in former Congolese soldiers, International Journal of Behavioral Development 37(6): 505-513.
- Haer R. & Meidert N. (2013), Does the first impression count? Examining the effect of the welcome screen design on the response rate, Survey Methodology 39(2): 419-434.
- Haer R. & Becher I. (2012), A methodological note on quantitative field research in conflict zones: Get your hands dirty, International Journal of Social Research Methodology 15(1): 1-13.
- Haer R. (2012), The Organization of Political Violence by Insurgencies, Peace Economics, Peace Science and Public Policy 18(3): 1-11.
- Haer R. (2011), Commitment among Fighters: A Research Note, Peace Economics, Peace Science and Public Policy 17(1): 1-6.
- Haer R., Banholzer L. & Ertl V. (2011), Creating Compliance and Cohesion - How Rebel Organizations Manage to Survive, Small Wars and Insurgencies 22(3): 415-434.
- Gold V. & Haer R. (2011), The Diffusion of Atrocities"A Spatial Analysis on the Role of Refugees NEPS Working Paper Series.
- Maedl A., Haer R. & Odenwald M. (2011), Using Micro-Level Data to Map State Failure: The Example of Somalia, Civil Wars 13(1): 61-79.
- Schneider G., Banholzer L. & Haer R. (2010), Cain's Choice: Causes of One-Sided Violence against Civilians. In: Jakobsen T.G. (Ed.) War: An Introduction to Theories and Research on Collective Violence. New York: Nova Science Publishers.
- Goodwill amabassador
- Technical advisory board