The Economist:
Britain's election offers little respite for its woes
3 June 2017
Most independent experts predict long-term harm as well. According to the most recent estimates from the Centre for Economic Performance at the London School of Economics, a hard Brexit would reduce GDP per head by 2.6% over ten years, while a softer Swiss- or Norwegian-style Brexit would cut it by 1.3%...
Related publications
CEP Election Analysis: ‘Brexit and the UK Economy’, Swati Dhingra and Thomas Sampson. May 2017 Paper No' CEPEA040: http://cep.lse.ac.uk/pubs/download/ea040.pdf
CEP BREXIT Analysis: ‘The consequences of Brexit for UK trade and living standards’, Swati Dhingra, Gianmarco Ottaviano, Thomas Sampson and John Van Reenen. March 2016. http://cep.lse.ac.uk/pubs/download/brexit02.pdf
Related links
CEP Election 2017 webpage: http://cep.lse.ac.uk/election2017/default.asp
CEP Brexit 2016 webpage: http://cep.lse.ac.uk/brexit/