Services and supply chain operations management and contracting
Collaboration and competition within supply chains and service systems
Applied game theory (cooperative and non-cooperative)
Stochastic modelling and optimisation
Multi-echelon inventory theory
Ulaş Özen, Jan Fransoo, Henk Norde and Marco Slikker, 2008, “Cooperation between Multiple Newsvendors with Warehouses”, Manufacturing & Services Operations Management 10:311-324.
Ulaş Özen, Henk Norde and Marco Slikker, 2009 “A General Framework for Cooperation under Uncertainty”, Operations Research Letters 37:148-154.
Ulaş Özen, Henk Norde and Marco Slikker, 2011 “On the Convexity of Newsvendor Games”, International Journal of Production Economics 133: 35-42.
Armağan Tarım, Mustafa K. Doğru, Ulaş Özen and Roberto Rossi, 2011 “An Efficient Computational Method for a Stochastic Dynamic Lot-Sizing Problem under Service-Level Constraints”, European Journal of Operational Research 215: 563-571.
Lei Duan, Mustafa K. Dogru, Ulaş Özen and J. Chris Beck, 2012 “A Negotiation Framework for Linked Combinatorial Optimization Problems”, Journal of Autonomous Agents and Multi-Agent Systems 25: 158–182.
Ulaş Özen, Marty Reiman and Qiong Wang, 2011 “On the Core of Cooperative Queueing Games”, Operation Research Letters 39: 385-389.
Ulaş Özen, Greys Sošić and Marco Slikker, 2012 “A Collaborative Decentralized Distribution System with Demand Updates”, European Journal of Operational Research 216: 573-583.
Ulaş Özen, Mustafa. K. Doğru and Armağan Tarım, 2012 “Static-Dynamic Uncertainty Strategy for a Single-Item Stochastic Inventory Control Problem”, OMEGA – the International Journal of Management Science 40: 348-357.
Ulaş Özen, Nesim Erkip and Marco Slikker, 2012 “Stability and monotonicity in newsvendor situations”, European Journal of Operational Research 218: 416-425.
Daria Terekhov, Mustafa K. Doğru, Ulaş Özen and J. Chris Beck, 2012 “Solving Two Machine Assembly Scheduling Problems With and Without Inventory Constraints”, Computers and Industrial Engineering 63: 120-134.
Ulaş Özen and Mustafa. K. Doğru, 2012, (in Turkish) “Rassal Öbek Büyüklüğü Belirleme Probleminin Doldurma Servis Kısıtı Altında İncelenmesi”, Hacetepe University, Faculty Journal of Economic and Administrative Sciences (İİBF) 30(1): 121-146.
Mustafa K. Doğru and Ulaş Özen, 2015, “Tactical Inventory Planning at Alcatel-Lucent's Repair and Exchange Services” Interfaces, 45(3): 228-242.
Henk Norde, Ulaş Özen and Marco Slikker, 2016, “Setting the Right Incentives for Global Planning and Operations” European Journal of Operational Research 253: 441-455.
Ali C. Randa, Mustafa K. Doğru, Cem İyigün and Ulaş Özen, 2019, “Heuristic Methods for The Capacitated Stochastic Lot-Sizing Problem Under The Static-Dynamic Uncertainty Strategy” Computers and Operations Research 109: 89-101.
Lei Duan, Mustafa K. Doğru, Ulaş Özen, J. Chris Beck, 2010, “Multi-Agent Negotiation for Distributed Production Scheduling Problems”, Proceedings of the Third International Workshop on Agent-based Complex Automated Negotiations.
Tony T. Tran, Mustafa K. Doğru, Ulaş Özen, J. Chris Beck, 2013, “Scheduling a Multi-Cable Electric Vehicle Charging Facility”, Proceedings of the ICAPS 2013 Workshop on Scheduling and Planning Applications (SPARK), 20-26, Rome, Italy.
Matthew Andrews, Ulaş Özen, Martin I Reiman, Qiong Wang, 2013, “Economic models of sponsored content in wireless networks with uncertain demand”, Proceedings of the Second IEEE International Workshop on Smart Data Pricing, IEEE INFOCOM 2013, 345-350, Turin, Italy
Chapters in Books
“Cooperative Newsvendor Games: A Review” with Luigi Montrucchio, Henk Norde, Marco Scarsini and Marco Slikker, published in: Tsan-Ming Choi (editor), Handbook on Newsvendor Problems: Models, Extensions and Applications, 137-162, Springer New York.
“Economic models of sponsored content in wireless networks with uncertain demand” with Matthew Andrews, Martin I Reiman, Qiong Wang, 2014, in: Soumya Sen, Carlee Joe-Wong, Sangtae Ha and Mung Chiang (editors), Smart Data Pricing, 269-288, John Wiley & Sons
Editorial and Reviewer Activities
Referee for Manufacturing and Service Operations Management, European Journal of Operational Research, Production and Operations Management, Naval Research Logistics, Operations Research Letters, International Journal of Production Economics
Awards & Recognition
Awarded European Commission Marie Curie Career Integration Grant for the research project entitled “Cooperation in Service Systems and Supply Chains”, Project Duration: 24 months, Budget: 50,000 euro. 2014-2016
Awarded the certificate of outstanding achievement: Excellence in knowledge transfer, “Inventory planning and optimization for advance exchange services project”, Bell Labs Ireland. 2010
Awarded a traveling grant from Netherlands Organization of Scientific Research (NWO) for a three-month visit to Marshall School of Business, USC, Los Angeles. 2005