I agree that a physics PhD + JD or MBA degree is very valuable, probably more valuable than the JD or MBA alone, but does it overcome the opportunity cost? We're talking 7+ years of lost income, plus the possibility of extra student debt.
In pure monetary terms, probably not, unless you start your own hedge fund. But it'll let you work in areas that just a JD or MBA would not, and for a lot of people that's valuable. And you're not nearly as financially behind as if you'd gotten the straight Ph.D and played the tenure/academia game.
