Despite continuing interest in employee alcohol and illicit drug use, there has been little systematic and integrative dissemination of research findings. This has led to many inaccurate claims and beliefs regarding the prevalence, causes, and productivity outcomes of employee substance use. In this authoritative book, Michael R. Frone takes a close, hard look at what we know and don't know about workforce and workplace substance involvement. In doing so, he exposes the lack of evidence behind many popular myths that have persisted since the 1980s ""war on drugs,"" including: The myth that workplace alcohol and illicit drug use is highly prevalent The myth that employee substance use has a strong effect on productivity, leading to high costs for employers The myth that drug testing and employee assistance programs are proven ways for employers to deter substance use Frone's comprehensive review covers nearly all of the related research conducted over the past 20-30 years, including several national studies and government reports as well as the broader research literature. In particular, Frone analyses methodological limitations and the tendency of many science reporters to ""go beyond the data"" when interpreting results.Given the need for evidence-based management and policy, this book will be a comprehensive resource for researchers and practitioners in management, occupational health, and addiction treatment/prevention.