This article seeks to answer a fundamental antitrust question: does crime pay? Do the current overall levels of U.S. cartel sanctions adequately discourage firms from engaging in illegal collusion? Seven years ago our research showed that the unfortunate answer was clearly that, yes, criminal collusion usually is profitable! The expected costs (in terms of criminal fines and prison time, civil damages, etc.) was significantly less than expected gains to the price fixers. Sadly, the most recent data re-affirm this conclusion. The great majority of companies participating in illegal cartels make a profit even after they pay all the penalties. The current level of sanctions is only 9 to 21 percent of optimality, so it follows that current ove...