See
http://www.nytimes.com/2011/03/13/business/13hire.html

<< ...So, as only a data-mining giant like Google can do, it began analyzing performance reviews, feedback surveys and nominations for top-manager awards. They correlated phrases, words, praise and complaints.

Later that year, the “people analytics” teams at the company produced what might be called the Eight Habits of Highly Effective Google Managers. ...>>