Three invited lectures from the wonderful ESSA 2013 conference in Warsaw. The first by Rob Axtell is a too-scale model of employment in the US, which validates against many different sets of data. In contrast the physics-type models of Dirk Helbing try to explain more with simpler models. Andre Nowak gives a more psychological perspective to simulation modelling.
http://www.youtube.com/channel/UCQ7VYOFQpvXeDIHGBv9ulqQ/videos
