In support of decisionmakers in New Hampshire considering options for expanding investments in early childhood, especially for the state's most vulnerable children, researchers from the RAND Corporation conducted an assessment of the landscape of current investments in early childhood programs in the state; summarized the research evidence on the benefits and economic returns of three strategies for early intervention--home visiting in the first few years of life, high-quality child care for young children, and high-quality preschool; and estimated the costs and benefits of statewide investments in proven early childhood programs targeted to at-risk children. (author abstract)