@inbook {13148,
	title = {Why Does the Rate of Youth Force Activity Differ Across Surveys?},
	booktitle = {The Youth Labor Market Problem: Its Nature, Causes and Consequences},
	year = {1981},
	pages = {75-114},
	publisher = {University of Chicago Press},
	organization = {University of Chicago Press},
	author = {Richard Freeman and James Medoff}
}
