http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6430&CESifoWP.search=+
https://assets.publishing.service.gov.uk/media/655f62310c7ec8001195bd5f/231123_Harrington-Review-Report-FINAL-2__HH_Global_.pdf
https://www.esri.ie/system/files/publications/RB202017_2.pdf