I don't know. I have several friends who went to Harvard Business School and it seems like a degree from HBS or equivalent is a requirement to get into certain fields. It's hard to get into private equity for example. I'm sure someone will reply and say "I ran a lemonade stand, now work at a top PE firm." But top schools are a core feeder. Likewise into consulting -- hard to get a job at Bain or BCG without a degree from HBS.