Bootstrap Tests of Mean-Variance Efficiency with Multiple Portfolio Groupings Staff Working Paper 2014-51 Sermin Gungor, Richard Luger We propose double bootstrap methods to test the mean-variance efficiency hypothesis when multiple portfolio groupings of the test assets are considered jointly rather than individually. Content Type(s): Staff research, Staff working papers Topic(s): Asset pricing, Econometric and statistical methods, Financial markets JEL Code(s): C, C1, C12, C14, C15, G, G1, G12