Zusammen mit Rahel Schomaker: Public Private Partnerships in the Middle East and North Africa – Why is Private Sector Participation in Infrastructure Projects in the Region So Low?, Allied Social Sciences Associations (ASSA) Annual Conference 2010, Atlanta (USA), 3.1.2010 Middle East Economic Association (MEEA) (Peer review-Verfahren).

Zusammen mit Rahel Schomaker: The Root Causes of Terrorism: Which Role does the "Youth Bulge" Play?, Allied Social Sciences Associations (ASSA) Annual Conference 2011, Denver (USA), 7.1.2011, Middle East Economic Association (MEEA) (Peer review-Verfahren).

Zusammen mit Alexander Eisenkopf, Christian Burgdorf, Andreas Lueg-Arndt: The case for deregulating intercity bus service in Germany, 16th Hongkong Society for Transportation Studies International Conference, Hongkong (China), 17.12.2011 (Peer-Review-Verfahren).

Zusammen mit Rahel Schomaker und Nils Otter: The Potential for Violence of ”Youth Bulges“ in the Middle East Migration and Terrorism as ”Exit“ and ”Voice“, Allied Social Sciences Associations (ASSA) Annual Conference 2012, Chicago (USA), 6.1.2012, Middle East Economic Association (MEEA) (Peer review-Verfahren).