Christensen Associates uses multiple approaches to provide public-sector agencies and private businesses with program and policy evaluations. Program evaluation applies analytical tools to assess the effectiveness of specific policy interventions. Prospective evaluation helps decision makers determine whether to pursue a policy and, if so, can identify the most effective approach.  Retrospective evaluation determines the net benefits actually achieved, reveals unanticipated outcomes, and can identify refinements and alternatives that would improve policy effectiveness.  Our methods include benefit-cost analysis, cost-effectiveness analysis, cost-utility analysis, economic impact analysis and return on investment (ROI).  Our approaches are well-founded in economics and other behavioral sciences and are implemented through rigorous use of state-of-the-art statistical techniques.