@article{Back1992,
	title = {GMM, maximum likelihood, and nonparametric efficiency},
	author = {Kerry Back and David P. Brown},
	journal = {Economics Letters},
	month = {May},
	number = {1},
	pages = {23--28},
	url = {http://www.sciencedirect.com/science/article/B6V84-45DMTJB-KT/2/6747d39cc8959ed0698a4edd4279c07c},
	volume = {39},
	year = {1992},
	biburl = {http://www.bibsonomy.org/bibtex/2d822afbd5ec39ee64ffc25505851aeff/smicha},
	description = {Economics Letters},
	keywords = {imported }
}