You've probably heard of "the Laffer curve," the tax chart that Arthur Laffer sketched on the back of a napkin for Ronald Reagan, and that supposedly heavily influenced Reagan's thinking on tax cuts. Well, here's the Tabarrok curve:
I agree with Alex Tabarrok's napkin curve, by the way. So who will be the first president to take it up as a cause?
You can read much more from Tabarrok on patents here. Or you can listen to the excellent "This American Life" on the subject here.