Rewards for whistleblowers – is it an efficient way to detect crimes? Or will it lead to fraudulent reports, making law enforcement costlier and less effective in the end? These questions are at the centre of a heated debate, as US enforcement agencies have been increasingly relying on incentives for corporate whistleblowers, while their European counterparts appear weary of introducing them. SITE Professor Giancarlo Spagnolo, together with Paolo Buccirossi and Giovanni Immordino, try to shed some light on this debate by studying how an effective reward program can be designed.