
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1747en.pdf

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/623810/Wage_Growth_in_PRB_Occupations_-_final_report__3_.pdf

https://knowledge.wharton.upenn.edu/article/will-jobs-return/?utm_source=kw_newsletter&utm_medium=email&utm_campaign=2020-04-07