This book constitutes the refereed proceedings of the 20th International Conference on
Principles and Practice of Multi-Agent Systems PRIMA 2017 held in Nice France in October
November 2017. The 24 revised full papers presented together with one abstract of a keynote
talk and 11 short papers were carefully reviewed and selected from 88 submissions. The
intention of the papers is to showcase research in several domains ranging from foundations of
agent theory and engineering aspects of agent systems to emerging interdisciplinary areas of
agent-based research.
