Public Health Law Research (PHLR) is a national program of the Robert Wood Johnson Foundation. The program seeks to build the evidence for and strengthen the use of regulatory, legal and policy solutions to improve public health and help people lead healthier lives. PHLR is equally interested in identifying and ameliorating laws and legal practices that unintentionally harm health. PHLR�s purpose is to answer important questions, such as: How does law influence health and health behavior? Which laws have the greatest impact? Can current laws be made more effective through better enforcement, or do they require amendment?