Yeah, sounds unlikely doesn't it?
But that's what the forecast says. 4% of productivity lost over the long term of 15 years due to loss of comparative advantage
https://obr.uk/forecasts-in-depth/the-economy-forecast/brexit-analysis
But the forecast is for the cost, no benefit is included.
The loss of comparative advantage is replaced, I'd argue, with competitive advantage which has a much stronger effect. The UK is no longer bound by the anti science regulations on genetic engineering and the new overly restrictive proposed regulations on AI
GDP per capita is a ratio of GDP / population, so if you do more with fewer people, by using automation, robots and AI, your GDP per capita will grow...
The 4% figure over 15 years is a difference of 0.29% to 0.27% productivity growth. Government policy has at least that 0.02% effect
I predict a Starmer govt will be able to introduce policy that will offset the productivity loss just by investing in renewable energy, let alone any research universities' innovations.
You don't understand your own link, 🤡