@article {580681,
	title = {Foreign Trade and Investment: Firm-Level Perspectives},
	journal = {Economica},
	volume = {81},
	number = {321},
	year = {2014},
	pages = {1-14},
	url = {https://doi.org/10.1111/ecca.12064},
	author = {Elhanan Helpman}
}
