It's a little bit mysterious why exactly this is the case, but which party controls the White House sure does seem to have a large effect on a variety of macroeconomic variables. Might I suggest that figuring out what explains this is a pretty important area for research? Smarter people than I are going to have to get on the case.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.