“[I]t is reasonable to expect that we will have a growing number of effective social programs to attack leading social problems. Consider the examples of the Teen Pregnancy Prevention (TPP) program and the Maternal, Infant, and Early Childhood Home Visiting Program (MIECHV) created by federal legislation in 2009. Based on thorough reviews of the literature, conducted by the Department of Health and Human Services and the Mathematica Policy Research company, in 2010 HHS concluded that there were 28 TPP programs and 7 home visiting model programs that met the HHS criteria for high-quality evidence showing that the programs produced significant impacts on important measures of teen sexual activity or teen pregnancy for the TPP program and maternal behavior or child outcome for the MIECHV program.”

http://www.brookings.edu/research/testimony/2016/06/22-renewing-communities-and-providing-opportunities-through-innovative-solutions-to-poverty-haskins