http://www.transparency.org/news/feature/europe_and_central_asia_an_overall_stagnation
http://eurodad.org/files/pdf/58d39b90e6546.pdf
http://www.cesifo-group.de/ifoHome/facts/DICE/Banking-and-Financial-Markets/Financial-Markets/Financial-Market-Regulation/DR-2017-1-oez-wech-macroprud-pol/fileBinary/DR-2017-1-oez-wech-macroprud-pol.pdf
https://www.brookings.edu/articles/the-hutchins-center-explains-the-neutral-rate-of-interest/