Journal Publications

• Yurter G, Nadar E, Kocaman AS (2024) The impact of pumped hydro energy storage configurations on investment planning of hybrid systems with renewables. Renewable Energy 222:119906.
• Bayrak B, Guray B, Uzunlar N, Nadar E (2024) Diffusion control in closed-loop supply chains: successive product generations. International Journal of Production Economics 268:109128.
• Toufani P, Karakoyun EC, Nadar E, Fosso OB, Kocaman AS (2023) Optimization of pumped hydro energy storage systems under uncertainty: a review. Journal of Energy Storage 73(D):109306.
• Nadar E, Akan M, Debo L, Scheller-Wolf A (2023) Optimal procurement in remanufacturing systems with uncertain used-item condition. Operations Research 71(5):1441-1453.
• Karakoyun EC, Avci H, Kocaman AS, Nadar E (2023) Deviations from commitments: Markov decision process formulations for the role of energy storage. International Journal of Production Economics 255:108711.
• Toufani P, Nadar E, Kocaman AS (2022) Short-term assessment of pumped hydro energy storage configurations: up, down, or closed? Renewable Energy 201:1086-1095.
• Toufani P, Nadar E, Kocaman AS (2022) Operational benefit of transforming cascade hydropower stations into pumped hydro energy storage systems. Journal of Energy Storage 51:104444.
• Nadar E, Kaya BE, Guler K (2021) New-product diffusion in closed-loop supply chains. Manufacturing & Service Operations Management 23(6):1413-1430.
• Nadar E, Ertürk MS (2021) Eco-design of eco-labels with coarse grades. Omega: The International Journal of Management Science 99:102209.
• Avci H, Gokbayrak K, Nadar E (2020) Structural results for average-cost inventory models with Markov-modulated demand and partial information. Production and Operations Management 29(1):156-173.
• Nadar E (2019) Optimization of sales plans in closed-loop supply chains with non-stationary consumer behavior. Gazi University Journal of Science Part C: Design and Technology 7(3):627-638.
• Dilek H, Karaer Ö, Nadar E (2018) Retail location competition under carbon penalty. European Journal of Operational Research 269(1):146-158.
• Nadar E, Akcay A, Akan M, Scheller-Wolf A (2018) The benefits of state aggregation with extreme-point weighting for assemble-to-order systems. Operations Research 66(4):1040-1057.
• Nadar E, Akan M, Scheller-Wolf A (2016) Experimental results indicating lattice-dependent policies may be optimal for general assemble-to-order systems. Production and Operations Management 25(4):647-661.
• Nadar E, Akan M, Scheller-Wolf A (2014) Optimal structural results for assemble-to-order generalized M-systems. Operations Research 62(3):571-579.

Dissertation

• New Markov Decision Process Formulations and Optimal Policy Structure for Assemble-to-Order and New Product Development Problems. E. Nadar —  Ph.D. Dissertation, Carnegie Mellon University, 2012.

Working Papers

• Avci H, Karakoyun EC, Kocaman AS, Nadar E, Toufani P. Integration of pumped hydro energy storage and wind energy generation: a structural analysis.
• Karakoyun EC, Avci H, Huh WT, Kocaman AS, Nadar E. Optimal hour-ahead commitment and storage decisions of wind power producers.
• Gulecyuz S, Gokbayrak K, Nadar E. Inventory management under Markov-modulated demand and limited information.

Awards and Honors

• First Place, POMS College of Supply Chain Management Student Paper Competition, 2012.
• Finalist, INFORMS George Nicholson Student Paper Competition, 2012.
• Finalist, INFORMS MSOM Society Student Paper Competition, 2012.
• Winner, Carnegie Mellon University Gerald L. Thompson Doctoral Dissertation Award in Management Science, 2012.