The market serving the health and human service needs of children with complex needs has grown increasingly complicated over the past decade. This market has several key elements—children and youth with severe emotional disorders, with addiction issues, with cognitive disabilities and autism, and with physical disabilities; children in the child welfare and juvenile justice systems; and children in need of special education services. For more on the market, see this issue's articles, How Do States Spend Child Welfare Funds? and The . . .