Project LAUNCH (Linking Actions for Unmet Needs in Children's Health), a federal program managed by the Substance Abuse and Mental Health Services Administration (SAMHSA), funds grants to pursue dual goals of improving early childhood systems and services in pilot communities. Communities have been selected because of a high need for services for families and children with significant risk factors, insufficient services, and significant health and economic disparities. The findings of the Cross-Site Evaluation of Project LAUNCH are presented in two volumes. This volume presents the results of the outcome evaluation. The outcome evaluation uses meta-analysis to summarize effects on providers, parents and children, and local and state systems, from studies conducted and reported by grantee local evaluators.