I have both (a PhD and an MBA) and I have also started a company before so I can speak to that part a little as well. I am sure a JD will also be useful but I

I have both (a PhD and an MBA) and I have also started a company before so I can speak to that part a little as well. I am sure a JD will also be useful but I question its utility compared to others. Also, I am surprised that everyone is focusing on what you learn in such programs but no one seems to care that both an MBA and a PhD are also gateways to meet like-minded folks who are potential co-founders (or, in the case of an MBA, potential co-founders or future investors). The company I co-founded was with PhD buddies and, even though I didn't do it myself with the MBA, I have seen many folks from my class working on startups during and after the MBA. Granted, both of these degrees were from Bay Area schools so that might have been a factor but still...