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NY Times: The New Economy and the Trump Rump - Why we went from regional divide to political chasm. By Paul Krugman

Amazon’s headquarters criteria perfectly illustrate the forces behind that divergence. Businesses in the new economy want access to large pools of highly educated workers, which can be found only in big, rich metropolitan areas. And the location decisions of companies like Amazon draw even more high-skill workers to those areas.

In other words, there’s a cumulative, self-reinforcing process at work that is, in effect, dividing America into two economies. And this economic division is reflected in political division.