One should do this analysis for various politicians, political parties, TV and news media and so on.
How do we know how good or bad the Economist is if we have no other source to compare against? Presumably it isn't trivial to predict the outcome of millions of people's reactions to all the complicated things that are happening to them.
Economists actually don't do that. They only use math. It's why they always get it wrong- they ignore the social sciences.
psychohistory, some are already doing it today (LLMs simulating various people with various beliefs interacting)