Soutenabilité des tarifications non linéaires

In a partial equilibrium framework, Sharkey and Sibley [1993] show paradoxally that all redistributive optimal two-part pricings are sustainable. They also suggest the extension of their main result to nonlinear pricing. In this paper, it is shown that in fact their result doesn't extend generally to non-linear pricing. First, a numerical example yielding negative results is put forward, secondly, the robustness of this negative result to variations of equilibrium solutions is analyzed.