
https://www.brookings.edu/articles/the-hutchins-center-explains-the-neutral-rate-of-interest/

https://fabiusmaximus.com/2016/10/16/stratfor-eu-budget-battles-after-brexit/

https://www.strath.ac.uk/media/1newwebsite/departmentsubject/strathclydebusinessschool/fraserofallander/FEC_Vol_41_No_2.pdf