LINCOLN, Neb. (AP) — A new study at the request of Nebraska lawmakers says Nebraska’s attempt to privatize its child welfare system has produced no measurable benefits.

The study compared results achieved by state child welfare workers and by the Nebraska Families Collaborative, the private agency that manages child welfare cases in the Omaha area.

The study found no cost savings and no significant difference in outcomes for children and families.

State lawmakers commissioned the study last year, as part of a bill authorizing the Nebraska Department of Health and Human Services to extend its contract with the collaborative into 2015.