Sarah Flèche : sarah.fleche[at]univ-amu.fr
Agnès Tomini : agnes.tomini[at]univ-amu.fr
The selection of mechanisms to allocate school seats in public school districts can be highly contentious. At the same time the standard statistics of student outcomes calculated from districts’ data are very similar for many mechanisms. This paper explains this puzzle as being driven by the invariance properties of the standard outcome statistics, thus contributing to the debate on mechanism selection.