@article {27647,
	title = {"How Are Preferences Revealed?"},
	journal = {Journal of Public Economics},
	volume = {92},
	number = {8-9},
	year = {2008},
	pages = {1787-1794},
	author = {John Beshears and James J.Choi and David Laibson and Brigitte C. Madrian}
}
