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The first study shows that MBA CEOs do poorly but there is no control. i.e. it may just be the case that capitalism is competitive and that most companies do po
by inputcoffee 10y ago
The first study shows that MBA CEOs do poorly but there is no control. i.e. it may just be the case that capitalism is competitive and that most companies do poorly.
The second study which compares MBA v Non-MBA on the covers of magazines is the more interesting study.
Firstly, 25% of the 444 CEOs had MBAs. I will assume that is statistically significant.
There are three questions that I would ask:
1. The difference was statistically significant, but what was the effect size? If you've squeezed out a 0.01% significance at 95% confidence, then that isn't impressive.
2. Was the effect driven by one or two CEOs? If Steve Jobs, Bill Gates, Jeff Bezos and Larry Page were in there, that alone may have accounted for the difference.
3. Is there another reason that magazine covers would lend themselves to a difference?