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I write a lot about what's currently called 'levelling up'. I've written about why I think that levelling up the GDP per person of the UK's large city functional economic areas is what we should be aiming for. Lots of clever people disagree.
So I regularly try to challenge myself. Other people think that levelling up quality of living, disposable income, health outcomes, educational outcomes, or happiness is a better target. Many of these things are quite highly correlated with GDP/capita, so we don't disagree much. But it's enough that I try to change my mind.
One of the ways that I do that is to make a prediction using my beliefs that I can test using data which I don't have yet. Then I get the data, and check if I'm right or wrong. If I'm wrong, I find that a good way to start changing my mind.
So I've been looking at ways we might level up without thinking about the strength of an economy at all. And just as I was thinking about that it was suggested to me by Matt Killcoyne at The Adam Smith Institute that I should look at where people own cars, and where cars kill pedestrians.