@article{Beckert2008,
author = {Walter Beckert and Richard Blundell},
title = {Heterogeneity and the nonparametric analysis of consumer choice: conditions for invertibility},
journal = {Review of Economic Studies},
year = {2008},
month = {Oct},
volume = {75},
number = {4},
pages = {1069-1080},
url = {},
}