Birgit Grodal: A Friend to Her Friends.- On the Definition of Differentiated Products in the Real World.- Equilibrium Pricing of Derivative Securities in Dynamically Incomplete Markets.- Adaptive Contracting: The Trial-and-Error Approach to Outsourcing.- Monetary Equilibria over an Infinite Horizon.- Do the Wealthy Risk More Money? An Experimental Comparison.- Are Incomplete Markets Able to Achieve Minimal Efficiency?.- A Competitive Model of Economic...