@article {600126,
	title = {Labour Market Rigidities, Trade and Unemployment},
	journal = {Review of Economic Studies},
	volume = {77},
	number = {3},
	year = {2010},
	pages = {1100-1137},
	url = {http://dx.doi.org/10.1111/j.1467-937X.2010.00600.x},
	author = {Elhanan Helpman and Oleg Itskhoki}
}
