This is a recommended read by Simon Wren-Lewis, the respected Oxford economist. Knowing his liberal political leanings, it is significant that he comes to the defence of George Osborne over Brexit.
Source: mainly macro: In defence of George Osborne over Brexi – Simon Wren-Lewis
Of course, there can be different views about presentation, packaging and window-dressing but the Treasury‘s evidence on Brexit is compelling. This, of course, is echoed by the Bank of England.
Britain will remain better off remaining part of the EU.