
https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf

https://uk.reuters.com/article/uk-britain-eu-options/stairway-to-brexit-barnier-maps-out-uks-canadian-path-idUKKBN1ED23R

https://www.socialeurope.eu/brexit-can-be-stopped-but-the-window-of-opportunity-is-closing-fast