I've explained that it is silly for Obama and others to think it is easy to squeeze more money from rich taxpayers, and I've also provided evidence from the 1980s to show that upper-income people have considerable ability to respond to changes in tax rates by shifting the timing, level, and composition of their income.
But I haven't specifically responded to some recent studies which make rather outlandish claims that the revenue-maximizing tax rate is 70 percent or above.
