The 4th edition of the International Conference on Public Policy (ICPP4) took place at the University of Concordia from 26th to 28th June 2019 with a preconference on the 25th June. Following the success of the previous editions of the Biennial International Conference on Public Policy (ICPP) (Grenoble 2013 – 900 attendees; Milan 2015 – 1300 attendees, Singapore 2017 - 1300 attendees), the ICPP4 was held with great success. More than 1300 participants from 84 different countries took part in the event and exchanged their views over more than 20 themes. A total of 171 panels, 310 sessions, and three plenary sessions were organized during the conference.