https://www.bruegel.org/wp-content/uploads/2022/04/PC-06-1.pdf
https://www.brookings.edu/articles/the-hutchins-center-explains-the-neutral-rate-of-interest/
https://www.raadvanstate.nl/publicaties/publicaties.html
https://www.diw.de/documents/publikationen/73/diw_01.c.670904.de/19-31-3.pdf