Authors: Theo Nijman Marno Verbeek

Citation: Theo Nijman et Marno Verbeek, The optimal choice of controls and pre-experimental observations, Journal of econometrics, 51(1-2), 1992, pp. 183

Authors: Marno Verbeek Theo Nijman

Citation: Marno Verbeek et Theo Nijman, Testing for Selectivity Bias in Panel Data Models, International economic review, 33(03), 1992, pp. 681