People analytics is a fascinating problem and I think it's high time someone tried to introduce concrete data to it. Several companies are tackling it in their own ways.
At http://InterviewKickstart.com, for example, we're starting to find some interesting correlations between personal confidence-level of an engineer coming in, and their employability. Yet another correlation is between academic achievements and employability. Small data, but interesting still.
Confidence helps you build a rapport, which is what interviewing is.
Academic achievement, however meaningless that GPA number is, is still a proxy to you working hard for a goal (for the most part). Job search is a goal.
At http://InterviewKickstart.com, for example, we're starting to find some interesting correlations between personal confidence-level of an engineer coming in, and their employability. Yet another correlation is between academic achievements and employability. Small data, but interesting still.