IMPS 2014 was held in Madison, Wisconsin, USA from July 22 through July 25, with preconference workshops on July 21.  The chairs of the local organizing committee were Dan Bolt, David Kaplan, and Jim Wollack. There were 380 participants representing 26 different countries.

Judea Pearl's Keynote Lecture Slides
IMPS 2014 Program Book
IMPS 2014 Abstract Book for Talks and Posters

Pieter Kroonenberg’s photos are available here (password: impsphoto).