The GOP seems to systematically preside over slower growth and rising inequality.

I’ve known about this result for quite a while. But I’ve never written it up. Why? Because I can’t figure out a plausible mechanism. Even though I believe that politics has a big effect on income distribution, this is just too strong — and too immediate — for me to see how it can be done. Sure, Republicans want an oligarchic society — but how can they do that?