Charters can determine educational approach, so many adopt very specific programs tailored for their small, often at-risk, student body.

FORBES: 01.24.08, 6:38 PM ET

In an open letter to Harvard's Faculty of Arts and Sciences, the university said it searched the email after two leaks from Harvard's Administrative Board, which was overseeing the cheating probe, led to concerns that student information was at risk.

WSJ: Harvard Explains Secret Email Search

"While the specific document made public may be deemed by some as not particularly consequential, the disclosure of the document and nearly word-for-word disclosure of a confidential board conversation led to concerns that other information -- especially student information we have a duty to protect as private -- was at risk, " said a statement from Deans Michael D.

CNN: Harvard apologizes after secret e-mail search

In particular, I had always mistrusted the Value-at-Risk metric and its offshoots that had been crammed down my throat as an undergraduate finance student.

FORBES: Nassim Taleb's 'Antifragile' Celebrates Randomness In People, Markets