@article{1781403,
abstract = {We suggest in this paper to treat the problem of smoothing demand by aggregation in a two-step procedure, corresponding to the two different constituents of consumption characteristics, wealth and preferences. Instead of imposing a manifold structure on preferences we exploit the nice structure of wealth-space. The first step of this procedure, aggregation with respect to wealth, is carried out. It is shown that, for any preference, aggregation with respect to wealth yields a mean demand which is almost everywhere C 1. Moreover, it is shown that for an important class of preferences, vanishing Gaussian curvature of indifference surfaces does not destroy differentiability of the mean demand function.},
author = {Dierker, Egbert and Dierker, Hildegard and Trockel, Walter},
issn = {0304-4068},
journal = {Journal of Mathematical Economics},
number = {3},
pages = {227--247},
title = {{Smoothing demand by aggregation with respect to wealth}},
doi = {10.1016/0304-4068(80)90011-7},
volume = {7},
year = {1980},
}