comments:
jonsca posted on r/askacademia1w
If the school that granted your MBA has a doctoral program, find out what it's like from people in it. That way, you can frame their experience in terms that you know. Particularly anyone that's gone from the MBA program into the doctoral program, because they can give you the best idea of whether you'll have the background for it. A book like https://www.amazon.com/Ph-D-Process-Students-Graduate-Sciences/dp/0195119002 is an oldie but goodie that will give you broad strokes as to day to day life (it's slanted toward the biological and physical sciences, but most should still be relatable).