Preference Modeling for Group Decision and Negotiations -- Solving Multicriteria Group Decision-making (MCGDM) Problems based on Ranking with Partial Information -- How to Address Multiple Sources of Influence in Group Decision-making -- From a Nonordering to an Ordering Approach -- Choosing a Committee under Majority Voting -- Reciprocity and Rule Preferences of a Rotating Savings and Credit Association (ROSCA) in China: Evolutionary Simulation in Imitation Games -- Modeling the Conflict within Group Decision Making: A Comparison Between Methods that Require and do not Require the Use of Preference Aggregation Techniques -- Collaborative Decision Making Processes -- UX challenges in GDSS: An Experience Report -- A Voting Procedures Recommender System for Decision-making -- Why is it Worth it to Expand your Set of Objectives? Impacts from Behavioral Decision Analysis in Action -- Identifying and Ranking Critical Success Factors for Implementing Financial Education in Taiwan Elementary Schools -- Conflict Resolution -- War as a Technique of International Conflict Resolution – an Analytical Approach -- The Effect of Conformists’ Behavior on Cooperation in the Spatial Public Goods Game -- Effect of Pollution on Transboundary River Water Trade -- Behavioral OR -- Cognitive Style and the Expectations Towards the Preference Representation in Decision Support Systems -- Cue Usage Characteristics of Angry Negotiators in Distributive Electronic Negotiation -- Opinion Dynamics Theory Considering Trust and Suspicion in Human Relation -- Negotiation Support Systems and Studies (NS3) -- A Framework for Gamified Electronic Negotiation Training -- Application of Data Mining Methods for Pattern Recognition in Negotiation Support Systems.