http://www.oecd.org/fr/emploi/emp/Editorial-and-executive-summary-FR.pdf
https://journals.sagepub.com/doi/pdf/10.1177/10242589211022550
http://www.ftseglobalmarkets.com/news/uk-pension-deficits-rise-to-£145bn-liabilities-at-record-high.html
https://www.socialeurope.eu/2017/06/world-imbalances-decline-wages/