@book{65733,
	author = {Douglas W. Elmendorf,N. Gregory Mankiw,Lawrence H. Summers},
	title = {Brookings papers on economic activity:},
	publisher = {Brookings Institution Press,},
	year = {2008},
	url = {http://portal.igpublish.com/iglibrary/search/BIPB0000029.html}
}