Population outflows from New York, Chicago and Los Angeles have already been getting some attention in the U.S. (some of it from me). Partisan politics often intrude into this discussion, which is one reason it can be helpful to internationalize things. Big cities in other rich countries tend to be run by left-leaning politicians, just as in the U.S., but more-centralized national governments generally mean that taxes and other policies don’t vary nearly as much between regions. Other forces must be at work as well.
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