A Bruegel (a European think tank that specialises in economics) paper:
This paper leaves aside the issue of EU reform and focuses on the desirable EU-UK relationship after Brexit. The authors argue that none of the existing models of partnership with the EU would be suitable for the UK. They propose a new form of collaboration, a continental partnership, which is considerably less deep than EU membership but rather closer than a simple free-trade agreement.
Just the kind of big thinking everyone should be considering.