| Source: Ezra Klein's Wonkbook; Slate Magazine's Visual Guide to Inequality |
This is pretty straightforward. Obviously, the rich make out pretty well under Republican administrations, while everyone does pretty well under Democratic administrations. The rub, however, is in the causal mechanisms. No one can say for sure why this happens. The easy target is tax policy, but as the Slate series goes over in quite a bit of detail, a lot of academic research by political scientists (Larry Bartels, Jacob Hacker, Paul Pierson) and even liberal economist Paul Krugman hasn't been able to find solid evidence pointing to tax policy as the cause for this phenomenon. And the "usual suspects" - racial inequality, gender gaps, immigration - are also ruled out by convincing evidence by research in the Slate series.
So what could it be? Nobody knows for sure, but Krugman points to "a strong circumstantial case for believing that institutions and norms … are the big sources of rising inequality in the United States." In short, we should be looking at the correlation between economic and political/social trends.
When Republicans are in power, people think and behave differently in the market than when Democrats are in power? An interesting idea, one that certainly bears further investigation. Sounds like a job for our behavioral economists!
In the mean time, the correlation (if not causation) is pretty clear. Do we really want to vote that in next November?
