In 2015 the Center for Sharing Public Health Services developed a model to measure the impact of cross-jurisdictional sharing (CJS) arrangements on service and program effectiveness and efficiency. The Center selected four projects that had recently implemented a cross-jurisdictional sharing arrangement ꟷ located in Michigan, Minnesota, North Dakota, and Wisconsin ꟷ with the goal of testing the model it had developed. Over a period of 18 months, these four sites conducted activities aimed at measuring the changes in the effectiveness and efficiency of a program or service for which they had recently implemented a sharing agreement. All projects completed their work as planned and were successful (to various degrees) in demonstrating that the impact of CJS projects can be measured using the systematic approach developed by the Center. Publication number CSPHS/30-V1.