@article {11538,
	title = {Instrumental variables estimates of the effect of subsidized training on the quantiles of trainee earnings},
	journal = {Econometrica},
	volume = {70},
	number = {1},
	year = {2002},
	pages = {91-117},
	author = {Guido Imbens and Alberto Abadie and Joshua Angrist}
}
