We argue that the intensity of competition within a group or organization can have an important influence on whether or not people cheat. To make this point we first work through a simple model of strategic misreporting in the workplace. For low and high levels of competition we show that, in equilibrium, few are predicted to misreport. It is for medium levels of competition that misreporting is predicted to be highest. We test this prediction experimentally and find good support for it. This finding has implications for the design of incentive structures within groups and organizations. (C) 2013 Elsevier B.V. All rights reserved.