The Autonomous Agents and Multiagent Systems (AAMAS) conference series gathers researchers from around the world to share the latest advances in the field. It is the premier forum for research in the theory and practice of autonomous agents and multiagent systems. AAMAS 2002, the first of the series, was held in Bologna, followed by Melbourne (2003), New York (2004), Utrecht (2005), Hakodate (2006), Honolulu (2007), Estoril (2008), Budapest (2009), Toronto (2010), Taipei (2011), Valencia (2012), Saint Paul (2013), Paris (2014), Istanbul (2015), Singapore (2016), São Paulo (2017) and Stockholm (2018). This volume is the proceedings of AAMAS 2019, the 18th conference in the series, held in Montreal in May 2019. AAMAS 2019 invited submissions for a general track and six special tracks: Robotics, Socially Interactive Agents, Engineering Multiagent Systems, Blue Sky Ideas, and Industrial Applications, along with a track to present papers from JAAMAS (the journal Autonomous Agents and Multi- Agent Systems) that had not previously been presented at a major conference. The special tracks were chaired by leading researchers in their fields: Joydeep Biswas and Mohan Sridharan chaired the Robotics track, Ana Paiva and David Sarne the Socially Interactive Agents track, Amal El Fallah Seghrouchni and Michael Winikoff the Engineering Multiagent Systems track, Catholijn Jonker the Blue Sky Ideas track, and Bo An and Yoram Bachrach the |