@unpublished{publication-11948,
	author={Levchenko, Andrei A and Zhang, Jingjing},
	institution={University of Zurich : UBS International Center of Economics in Society},
	issn={2296-2778},
	number=11,
	pages=63,
	series={UBS Center Working Paper Series},
	title={The evolution of comparative advantage: measurement and implications},
	year=2015,
}