https://www.socialeurope.eu/the-frugal-four-should-save-the-european-project
https://www.esri.ie/system/files/publications/SUSTAT123_2.pdf
https://www.google.com/url?esrc=s&q=&rct=j&sa=U&url=https://www.imf.org/-/media/Files/Publications/WP/2022/English/wpiea2022187-print-pdf.ashx&ved=2ahUKEwiDqLXjvqP9AhXwiP0HHSdXC0UQFnoECAQQAg&usg=AOvVaw3YLIKX-UVfKoiGtiG_7NjZ
https://www.resolutionfoundation.org/app/uploads/2019/11/The-shape-of-things-to-come.pdf