Facebook is so vast and tells such a complete story of us as social beings, that by analyzing it in smart ways, we can actually do things that were never possible before in human history, such as accurately predict where we should work, who we should date or how much money we will make during our lifetime.

FORBES: The Future Of Facebook: What's After The Social Graph?

Until we can predict college returns more accurately, students and their families should think in terms of reducing investment risk, says Richard Vedder, an Ohio University professor and director of the Center for College Affordability and Productivity, a Washington-based advocacy group.

WSJ: Upside: Is College the 'Best Investment'? Here's the Math