@article{Blundell2007,
author = {Richard Blundell and Xiaohong Chen and Kristensen, Dennis},
title = {Nonparametric IV estimation of shape-invariant Engel curves},
journal = {Econometrica},
year = {2007},
month = {Nov},
volume = {75},
number = {6},
pages = {1613-1669},
url = {},
}