%0 Journal Article %@ 0006-3444 %A Fedorov, V. %A Khabarov, V. %D 1986 %F iiasa:13653 %J Biometrika %K Discrimination between models; Estimation; Model fitting; Optimum design %N 1 %P 183-190 %R 10.1093/biomet/73.1.183 %T Duality of optimal designs for model discrimination and parameter estimation %U https://pure.iiasa.ac.at/id/eprint/13653/ %V 73 %X In the present paper ideas of Atkinson & Fedorov (1975) are generalized and clarified. The results illuminate the deep connection between estimation and model testing problems.