Group Problem Structuring and Negotiation -- Effects of Small Group Discussion: Case Study of Community Disaster Risk Management in Japan -- Understanding PSM Interventions Through Sense-Making and the Mangle of Practice Lens -- Negotiation and Group Processes -- Social Consciousness in Post-conflict Reconstruction -- How to Order the Alternatives, Rules, and the Rules to Choose Rules: When the Endogenous Procedural Choice Regresses -- The Hidden Costs of the Door-in-the-Face Tactic in Negotiations -- Preference Analysis and Decision Support -- Understanding and Using the Group Decision Analysis Model -- Distributive Justice, Legitimizing Collective Choice Procedures, and the Production of Normative Equilibria in Social Groups: Towards a Theory of Social Order -- A Multiple Criteria Model for Comparison of Subjective-Objective Evaluations and Its Application -- Using Surrogate Weights for Handling Preference Strength in Multi-criteria Decisions -- Veto Values Within MAUT for Group Decision Making on the Basis of Dominance Measuring Methods with Fuzzy Weights -- Inaccuracy in Defining Preferences by the Electronic Negotiation System Users -- A Multi-criteria Group Decision-Making Approach for Facility Location Selection Using PROMETHEE Under a Fuzzy Environment -- An Interval-Valued Hesitant Fuzzy TOPSIS Method to Determine the Criteria Weights -- Multiple Attribute Group Decision Making Under Hesitant Fuzzy Environment -- Formal Models -- Using Ordinal Regression for Interactive Evolutionary Multiple Objective Optimization with Multiple Decision Makers -- Fiscal-Monetary Game Analyzed with Use of a Dynamic Macroeconomic Model -- Voting and Collective Decision-Making -- A Framework for Aiding the Choice of a Voting Procedure in a Business Decision Context -- Vote Swapping in Representative Democracy -- The Choice of Voting Rules Based on Preferences over Criteria -- Conflict Resolution in Energy and Environmental Management -- Controversy Over the International Upper Great Lakes Study Recommendations: Pathways Towards Cooperation -- Option Prioritization for Three-Level Preference in the Graph Model for Conflict Resolution -- Negotiation Support Systems and Studies -- The Role of Communication Support for Electronic Negotiations -- More Than Words: The Effect of Emoticons in Electronic Negotiations -- Online Collaboration and Competition -- A Longitudinal Case Study on Risk Factor in Trust Development of Facilitated Collaboration -- Intention to Repurchase Group Coupon Service: The Intertwined Effect of Service Quality of Vendor and Service Provider -- Defining Human-Machine Micro-Task Workflows for Constitution Making -- Creating Value Through Crowdsourcing: The Antecedent Conditions -- On Integrating an IS Success Model and Multicriteria Preference Analysis into a System for Cloud-Computing Investment Decisions -- Demand Management with Energy Generation and Storage in Collectives -- Market Mechanisms and Their Users -- Back-End Bidding for Front-End Negotiation: A Model -- Lot-Rolling - Supply Chain Negotiation in a Two-Stage Multi-echelon System -- Procurement Auctions: Improving Efficient Winning Bids Through Multi-bilateral Negotiations.