2008, 'The Politics of Water Pumps: Violence, genealogy and political ecology in the Ethio-Somali borderlands', American Association of Geographers annual meeting, Boston, MA, April 19. ppt   2007, 'The Political Roots of the Current Crisis in Region 5', Chatham House, London, August 31. URL   2007, (with Didier Péclard) 'Negotiating Statehood in Africa: Propositions for an alternative approach to state and political authority', AEGIS European Conference on African Studies, African Studies Centre, Leiden, July 12. pdf   2007, 'Beyond Environmental Conflict? Nature, violence and agency', Workshop "Environmental Conflicts: Experiences from Africa and Central Asia", Europainstitut, University of Basel, June 8. ppt   2007, 'Pastoral Conflict and Resource Management in Ethiopia's Somali Region', Soutenance de thèse, Swiss Graduate School of Public Administration (IDHEAP), Chavannes-près-Renens, January 11. ppt   2006, 'State-building in the Pastoral Periphery: Evidence from Ethiopia's Somali region', African Studies Association USA 49th annual conference, San Francisco, CA, November 18. ppt   2006, 'From Fighting over Pastures to Fighting over Politics: How decentralisation transforms conflicts in Ethiopia's Somali region', Conference on Property Rights, Collective Action and Poverty Reduction in Pastoral Areas of Afar and Somali Regions, Ethiopia, International Livestock Research Institute, Addis Ababa, October 31. ppt   2005, 'Peace, Conflict and Development in Ethiopia’s Somali Region: Past and current dynamics as well as some suggestions for the future', Institute of Management and Development Studies, Jigjiga, December 8. ppt   2005, 'Beyond Clannishness and Colonialism: Understanding political disorder in Ethiopia’s Somali Region, 1991-2004', Max Planck Institute for Social Anthropology, Halle/Saale, October 19. ppt   2005, 'The Link Between Conflict and Land Management: A critique of approaches in development cooperation', Workshop "Land Conflicts as a Challenge for Development Cooperation and Peacebuilding: Experiences and strategies", Swisspeace, Bern, August 19. ppt   2005, 'Bringing the Sultan back in: Somali elders as peacemakers in Ethiopia's Somali region', AEGIS European Conference on African Studies, School of Oriental and African Studies (SOAS), London, June 29 to July 3. pdf   2004, 'The Rationality of Political Instability in the Somali Region of Ethiopia, 1991-2003', African Studies Association UK biannual conference "Debating Africa", Goldsmith College, London, September 13-15. pdf   2004, 'Violent Conflicts in the Somali Regional State of Ethiopia', Save the Children Fund-UK, Addis Ababa, August 9. ppt   2004, (with Alemmaya Mulugeta) 'Institutions and Resource Conflict Management in the Pastoral Lowlands of Ethiopia: Afar and Somali cases', Ethnologisches Mittwochs-kolloquium, Institute of Social Anthropology, University of Basel, February 4. ppt   2004, 'Gewalt, Konflikte und politische Ordnungen: eine Einführung', Colloquium "Umgang mit Gewalt – Im Fokus der Konfliktforschung" directed by Prof. Ueli Mäder, University of Fribourg i. Ü., January 24. ppt   2003, 'Gouvernance et conflit: relations empiriques et théoriques', Seminar "Théories et pratiques de la gouvernance" directed by Prof. Isabelle Milbert, Graduate Institute of Development Studies, Geneva, December 16. ppt   2003, 'Mitigating Violent Resource Conflicts in the Somali Region of Ethiopia', ZEFa research meeting, Center for Development Research, University of Bonn, November 19. pdf   2003, (with Simon A. Mason and Christine Bichsel) '"Trickling Down or Spilling Over?" - Exploring the links between international and sub-national water conflicts in the Eastern Nile and Syr Daria Basin', ECPR Joint Sessions of Workshops, Edinburgh, March 28 to April 2. pdf   2002, (with Eva Ludi) 'The Mitigation of Intergroup Conflicts over Resources: Concepts and approaches', Inter-Disciplinary Workshop "Dimensions, Dynamics and Transformation of Resource Conflicts between Indigenous Peoples and Settlers in Frontier Regions of South and Southeast Asia", Mont-Soleil/St. Imier, Switzerland, September 25-29. ppt   2002, 'Le rôle de l’arrangement politico-administratif dans la politique de l’accueil des requérants d’asile', Course "Politiques publiques comparées" directed by Prof. Peter Knoepfel, Swiss Graduate School of Public Administration (IDHEAP), Chavannes-près-Renens, June 11. ppt   2001, 'Wenn Studieren über Probieren geht: Überlegungen zum Lehren ziehen in der Friedensförderung (mit Beispielen der EU)', Annual Congress of the Swiss Association for Political Science, Freiburg i. Ü., November 9. pdf   2001, (with Asha El-Karib) 'Sudan and Armed Conflict – Are they Siamese twins?', ACORD and HEKS Swiss Interchurch Aid Focus Meeting on Sudan, Zürich, May 21-22. ppt