Lectures and notes: Mirzakhani's volume recursion and approach for the   Witten-Kontsevich theorem on moduli tautological intersection numbers
  The materials accompany a lecture short course presented at the 2011 Park City Mathematics Institute, Graduate Summer School on Moduli Spaces of Riemann Surfaces. The lectures were part of/coordinated with an overall program, including lectures by Ursula Hamenstadt on Teichmueller Theory, Andy Putman on Mapping Class and Torelli Groups, and Carel Faber on Tautological algebras of Moduli Spaces. 
Scott A. Wolpert
math.DG math.GT