@unpublished{dhingra:stg,
	author = {Dhingra, Swati  and Morrow, John },
	citeulike-article-id = {2526369},
	journal = {Working Paper},
	keywords = {Gains from Trade, Selection, Monopolistic Competition, Efficiency, Productivity},
	month = {December},
	title = {When is Selection on Firm Productivity a Gain from Trade?},
	year = {2010}
}