Arianne Cohen, author of The Tall Book (2009,) talking to the Wall Street Journal on the benefits and drawbacks to extreme height:

There are numerous statistics documenting tall success–tall folks earn $789 more per inch per year, a figure that’s stayed steady for the past five decades in both the U.S. and U.K.–but no one had every looked at why. And what I found is that much of it is behavioral–tall people consistently display a few behaviors that are directly correlated to success, which can be mimicked by anyone.