@book{1685,
	author = {Angrist, Joshua David and Pischke, Jörn-Steffen},
	title = {Mastering metrics :},
	publisher = {Princenton University Press,},
	year = {2015},
	address = {New Jersey :},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl//ebook_2/mastering-metrics/}
}