http://economics.mit.edu/files/12979
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1710en.pdf
http://ftp.iza.org/dp11249.pdf
https://www.brookings.edu/blog/brookings-now/2017/08/24/do-immigrants-steal-jobs-from-american-workers/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=55726788