[creshal]

> It is eyebrow-raising, to say the least, to bring in the Civil War as at all relevant and speculate even more wildly that it has intergenerational effects.

I wonder what the results would be if you applied that method to, say, Poland, or north-eastern France.

[cfcef]

You'll pick up a lot of post-WWII differences, but you can still try. There's an interesting paper exploiting the meandering of river-defined national borders to do a discontinuity design for long-run effects of the Austro-Hungarian Empire, for example, which is at least not obviously wrong.