In the real world It is best to remember just because an 'expert' or experts say something is likely to happen it doesn't necessarily make it true. Especially when their track record is extremely problematic. It's very telling you still can't provide evidence that these experts have any sought of credible record on making consistently accurate economic forecasts.
Your A/B examples are indicators that markets don't like uncertainty, they are not evidence for the overall long term economic positives/negatives of Brexit which the forecasts are guessing at.
You make one useful relevant point if 'everyone' (remainers) continually talk down our economic post Brexit prospects this increases uncertainty. It's almost like some of them have a vested interest in talking the UK down.. Also it's No 6 in the 'Ten Reasons Why Economists always get it wrong'
6.****Forecasts, of themselves,*affect the economy.* The forecast becomes part of the "given," and influences human behaviour--for good or ill.
Your third point was covered previously.
… Bear in mind that this is not the famous complaint from the Queen that nobody saw the financial crisis coming. The crisis was firmly established when these forecasts were made. The Financial Times had been writing exhaustively about the “credit crunch” since the previous summer. Northern Rock had been nationalised in the UK and Bear Stearns had collapsed in the US. It did not take a genius to see that trouble was on the way for the wider economy.
More astonishing still, when Loungani extends the deadline for forecasting a recession to September 2008, the consensus remained that not a single economy would fall into recession in 2009. Making up for lost time and satisfying the premise of an old joke, by September of 2009, the year in which the recessions actually occurred, the consensus predicted 54 out of 49 of them – that is, five more than there were. And, as an encore, there were 15 recessions in 2012. None were foreseen in the spring of 2011 and only two were predicted by September 2011.
Predictions from multinational organisations such as the IMF and the Organisation for Economic Co-operation and Development have remained very similar to the private sector consensus – similarly bad, that is.
https://next.ft.com/content/14e323ee-e602-11e3-aeef-00144feabdc0#axzz33EAHFQqf
This is evidence their predictive powers are shockingly suspect, consensus group-think isn't a plus ….which you continually ignore.
Interesting you think terms like rough idea and trickling in data and jobs linked to is a good basis for predictions. You mean numerous convenient assumptions that may be completely different next year and scenarios that you first say haven't been made clear by Brexiteers then refer to deals made by countries that are in no way comparable in economic/political size with the UK.
And finally there you go again suggesting forecasts are facts. Know one really knows what will happen be it poison or sweet ambrosia … anyone who says they do is a liar.
Well we've gone round and round in circles, of course and I take your points. All I can say is if the situation were reversed and 9/10 economists, IMF, OECD etc etc told me we would have a recession if we vote in, costs jobs, investment and so on I would vote Leave with confidence. I also take the point that it can become a self-fulfilling prophecy.