The Department of Justice today announced new research from the National Institute of Justice (NIJ) that finds school-level interventions reduced dating violence among middle school students by up to 50 percent in 30 New York City public schools. This study was originally conducted by the Police Executive Research Forum and funded by the National Institute of Justice, the research arm of the U.S. Department of Justice. The study used a multi-level, randomized control trial to find out what is effective in preventing dating violence and sexual harassment among over 2,500 sixth- and seventh-grade students.