**Pierre-Louis Lions**

**(Collège de France, Paris, France)**

An Introduction To Mean Field Games

This talk is an introduction to a new class of models called Mean Field Games that arise as the limits of Nash equilibria in a game where the number of players goes to infinity. The rigorous derivation of these models requires some new developments in Analysis that have other applications (to Statistical Physics and Mechanics). And we discuss some examples of such models (distribution of wealth in economics, population dynamics...).