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De récents résultats empiriques suggèrent que les caractéristiques estimées des technologies de production dépendent du modèle postulé (primal ou dual). Dans cet article nous nous intéressons à ce problème. Nous concluons que de différences significatives n’existent pas en ce qui concerne les données de Bell Canada.Recent empirical results of Burgess and Appelbaum suggest that estimated characteristics of macro production technologies may depend upon model specification (primal or dual). This paper examines the issue using Bell Canada data for the period 1956-1978. The results suggest that, at least for this set of firm-level data, estimated technological characteristics are robust with respect to model specification

Des observations empiriques encourageantes pour la théorie dualiste