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Yugoslav Journal of Operations ResearchPublisher: Faculty of Organizational Sciences, BelgradeISSN: 0354-0243Issue: 30_2Date: 2020Journal Homepage Editorial BoardImpressum   Duality for a Class of Second Order Symmetric Nondifferentiable Fractional Variational Problems 121 - 136 Ashish Kumar Prasad, Anant Pratap Singh and Sony Khatri   AbstractKeywords: Symmetric Duality; Variational Problem; Second Order F-convexity; Non-differentiable Programming.MSC: 90C26; 90C29; 90C30; 90C46DOI: 10.2298/YJOR190215004P Portfolio Selection Using R 137 - 146 Rohan Mishra and Bhagwat Ram   AbstractKeywords: Portfolio selection; ProgrammingMSC: 90B85; 90C26DOI: 10.2298/YJOR181115002M Modeling Cooperative Advertising Decisions in a Manufacturer-Distributor-Retailer Supply Chain Using Game Theory 147 - 176 Peter E. Ezimadu   AbstractKeywords: Cooperative Advertising; Supply Chain; Sethi Model; Stackelberg Game; Differential Game.MSC: 49N70; 91A65DOI: 10.2298/YJOR181115001E Estimation of Parameters of Nadarajah-Haghighi Extension of the Exponential Distribution Using Perfect and Imperfect Ranked Set Sample 177 - 198 Marija Minić   AbstractKeywords: Nadarajah-Haghighi Extension of the Exponential Distribution; Ranked set Sampling; Simple Random Sampling; Imperfect Ranking.MSC: 62F10; 62F07DOI: 10.2298/YJOR190415027M On Power of Control Chart for the Ratio of Two Poisson Distributions Under Misclassification Error 199 - 208 Ashit B. Chakraborty and Anwer Khurshid   AbstractKeywords: Misclassification Error; Ratio of Poisson Distribution; Power; Lavin EquationMSC: 62P30DOI: 10.2298/YJOR180315029C Joint Optimal Decisions on Pricing and Warranty Policy of Duopoly Supply Chain With One Common Retailer 209 - 236 Soumita Kundu and Tripti Chakrabarti   AbstractKeywords: Warranty; Pricing; Supply Chain Management; Quality; Stackleberg Game.MSC: 91B24DOI: 10.2298/YJOR180615007K Optimizing Preservation Strategies for Deteriorating Items With Time-Varying Holding Cost and Stock-Dependent Demand 237 - 250 Aditi Khanna, Priyamvada and Chandra K. Jaggi   AbstractKeywords: Deterioration; Stock-Dependent demand; Preservation technology investment; Time varying holding cost.MSC: 90B05DOI: 10.2298/YJOR190215003K

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