This guide is designed to provide merchants and retailers with a framework for understanding the underlying causes of their shoplifting problems and developing effective strategies to reduce shoplifting. It describes ways in which data on shoplifting can be collected and analyzed; helps readers identify and close off opportunities for shoplifting; and provides guidance on measuring the impact of those strategies. The guide offers an array of shoplifting prevention strategies that may prove effective, including: conducting employee bag checks at the end of each shift; partnering with local schools on anti-truancy efforts; increasing visible security guard presence during after-school hours; and tightening inventory control protocols.