Full Fact:
Stronger In 'facts' leaflet: leaving
23 May 2016
Claim Leaving the EU would cost the average UK household at least £850 a year, and potentially as much as £1,700, according to research released by the London School of Economics.
Conclusion These figures don’t tell you how much you or your family would lose, but they point in the same direction as most other economic analysis seems to.
"Leaving the EU would cost the average UK household at least £850 a year, and potentially as much as £1,700, according to research released by the London School of Economics."
London School of Economics’ Centre for Economic Performance