Publication of the Handbook of Group Decision and Negotiation marks a milestone in the evolution of the group decision and negotiation (GDN) eld. On this occasion, editors Colin Eden and Marc Kilgour asked me to write a brief history of the eld to provide background and context for the volume. They said that I am in a good position to do so: Actively involved in creating the GDN Section and serving as its chair; founding and leading the GDN journal, Group Decision and Negotiation as editor-in-chief, and the book series, “Advances in Group Decision and Negotiation” as editor; and serving as general chair of the GDN annual meetings. I accepted their invitation to write a brief history. In 1989 what is now the Institute for Operations Research and the Management Sciences (INFORMS) established its Section on Group Decision and Negotiation. The journal Group Decision and Negotiation was founded in 1992, published by Springer in cooperation with INFORMS and the GDN Section. In 2003, as an ext- sion of the journal, the Springer book series, “Advances in Group Decision and Negotiation” was inaugurated.

Organizational groups are continually settling on choices that impact on the adequacy of their performance and the organization at large. This volume makes reference to the nature of cooperative decision making, which despite being more beneficial than individual decision making, is still prone to risks including different personalities and incongruity of ideas. Some of the chapters in this book include; chapter 1: group decision-making and chapter 2: the essentials of negotiation among others. Strategies for improving collective decision making have been developed to such an extent that they can be utilized to guarantee top notch decisions in company settings. Cooperative decision-making measures are usually embraced to strengthen social bonds within the company. In this volume, the author examines the impacts of collective decision making on organizational goals, recognizing the strengths and result impacts of the strategy. In particular, it builds on the likelihood of attaining better results in comparison to individual decision-making strategy. Different ideas are presented and the most ideal ones are chosen.

Publication of the Handbook of Group Decision and Negotiation marks a milestone in the evolution of the group decision and negotiation (GDN) eld. On this occasion, editors Colin Eden and Marc Kilgour asked me to write a brief history of the eld to provide background and context for the volume. They said that I am in a good position to do so: Actively involved in creating the GDN Section and serving as its chair; founding and leading the GDN journal, Group Decision and Negotiation as editor-in-chief, and the book series, “Advances in Group Decision and Negotiation” as editor; and serving as general chair of the GDN annual meetings. I accepted their invitation to write a brief history. In 1989 what is now the Institute for Operations Research and the Management Sciences (INFORMS) established its Section on Group Decision and Negotiation. The journal Group Decision and Negotiation was founded in 1992, published by Springer in cooperation with INFORMS and the GDN Section. In 2003, as an ext- sion of the journal, the Springer book series, “Advances in Group Decision and Negotiation” was inaugurated.

Publication of the Handbook of Group Decision and Negotiation marks a milestone in the evolution of the group decision and negotiation (GDN) eld. On this occasion, editors Colin Eden and Marc Kilgour asked me to write a brief history of the eld to provide background and context for the volume. They said that I am in a good position to do so: Actively involved in creating the GDN Section and serving as its chair; founding and leading the GDN journal, Group Decision and Negotiation as editor-in-chief, and the book series, “Advances in Group Decision and Negotiation” as editor; and serving as general chair of the GDN annual meetings. I accepted their invitation to write a brief history. In 1989 what is now the Institute for Operations Research and the Management Sciences (INFORMS) established its Section on Group Decision and Negotiation. The journal Group Decision and Negotiation was founded in 1992, published by Springer in cooperation with INFORMS and the GDN Section. In 2003, as an ext- sion of the journal, the Springer book series, “Advances in Group Decision and Negotiation” was inaugurated.

The volume offers an exploration of methods for analysis of emotion in negotiation, such as cognitive modeling, discourse analysis, all testing, subsequent multidimensional scaling, impression rating, and graph modeling for conflict resolution, reasonable and unreasonable disagreement. It covers activities, such as business negotiation, conflict solving, bargaining, task management meetings, discussions, and elaborates on different kinds of emotions. Some emotions stimulate negotiation (e.g. empathy), others -hinder it (e.g. disgust). However, all emotions open a door to uncertainty in relations and negotiation, which in turn provides an opportunity. The volume views language in negotiation not only as a vehicle for transmission of thought but also as a manifestation of emotion and the ethical.

In the global marketplace, negotiation frequently takes place across cultural boundaries, yet negotiation theory has traditionally been grounded in Western culture. This book, which provides an in-depth review of the field of negotiation theory, expands current thinking to include cross-cultural perspectives. The contents of the book reflect the diversity of negotiation—research-negotiator cognition, motivation, emotion, communication, power and disputing, intergroup relationships, third parties, justice, technology, and social dilemmas—and provides new insight into negotiation theory, questioning assumptions, expanding constructs, and identifying limits not apparent from working exclusively within one culture. The book is organized in three sections and pairs chapters on negotiation theory with chapters on culture. The first part emphasizes psychological processes—cognition, motivation, and emotion. Part II examines the negotiation process. The third part emphasizes the social context of negotiation. A final chapter synthesizes the main themes of the book to illustrate how scholars and practitioners can capitalize on the synergy between culture and negotiation research.

This book constitutes the refereed proceedings of the 20th International Conference on Group Decision and Negotiation, GDN 2020, which was planned to be held in Toronto, ON, Canada, during June 7–11, 2020. The conference was cancelled due to the Coronavirus pandemic. Nevertheless, it was decided to publish the proceedings, because the review process had already been completed at the time the cancellation was decided. The field of Group Decision and Negotiation focuses on decision processes with at least two participants and a common goal but conflicting individual goals. Research areas of Group Decision and Negotiation include electronic negotiations, experiments, the role of emotions in group decision and negotiations, preference elicitation and decision support for group decisions and negotiations, and conflict resolution principles. The 14 full papers presented in this volume were carefully reviewed and selected from 75 submissions. They were organized in topical sections named: Conflict Resolution, Preference Modeling for Group Decision and Negotiation, Intelligent Group Decision Making and Consensus Process, Collaborative Decision Making Processes.