Hahn, Jinyong; Hirano, Keisuke and Karlan, Dean (2008): Adaptive Experimental Design Using the Propensity Score. Unpublished.
Hirano, Keisuke and Porter, Jack (2006): Asymptotics for statistical treatment rules. Unpublished.
Hirano, Keisuke and Porter, Jack (2009): Impossibility Results for Nondifferentiable Functionals. Unpublished.
