Just in time for New York's fashion week, Dan Ariely, the Duke Behavioral Economics professor and author of Predictably Irrational, sent Big Think a video on how fake designer sunglasses turn people into liars.  Okay, maybe he doesn't go that far, but he relates a study about how getting involved in petty acts of dishonesty - like sporting knockoff fashion - makes people more likely to commit more serious acts of fraud.  Check out the video after the jump.