This book constitutes the thoroughly refereed post-conference proceedings of the 12th
International Workshops on Coordination Organizations Institutions and Norms in Agent Systems
COIN 2016. The workshop COIN@AAMAS 2016 was held in Singapore Singapore in May 2016 and the
workshop COIN@ECAI 2016 was held in The Hague The Netherlands in August 2016. The 9 full
papers were carefully reviewed and selected from 15 submissions for inclusion in this volume.
They cover the following topics:Social Issues: The papers focus on the security of personal
data support for self-care for individuals with chronic conditions analysis of the risk of
information leakage in social networks and an analysis of issues arising in the design of
on-line environments whose participants are human and software.Teams: The papers consider
different aspects of team working: what kinds of knowledge sharing best contribute to effective
team performance and how to organize a team to function effectively in different kinds of
scenarios. Rights and Values: The papers examine complementary issues that influence the
effective design of normative systems namely how to detect opportunism so that it may be
discouraged how individuals values influence (collective) decision-making processes and how
rights and powers relate to value and conflict resolution in nested organizational structures.
