You're probably thinking of the Whitehall Study[0]. There's a more recent study about how being the person at the top can be really stressful too[1]. [0]https:

You're probably thinking of the Whitehall Study[0]. There's a more recent study about how being the person at the top can be really stressful too[1]. [0]https://en.wikipedia.org/wiki/Whitehall_Study https://en.wikipedia.org/wiki/Whitehall_Study [1] http://www.bmj.com/content/351/bmj.h6424 http://www.bmj.com/content/351/bmj.h6424