Good policy requires reliable scientific knowledge , but there are many obstacles . Most econometric estimates lack adequate statistical power some estimates cannot be replicated publication selection bias the selective reporting of results is common and there is wide variation in the evidence base on most policy issues . Metaregression analysis offers a way to increase statistical power , correct the evidence base for a range of biases , and make sense of the unceasing flow of contradictory econometric estimates . It enables policymakers to develop evidencebased policies even when the initial evidence base lacks credibility . <| sep |> I think it has the right kind of angle . It ' s not exactly straight , because we aren ' t designed to sit straight as a blank , but it ' s fairly rigid and upright . Might be a problem or a feature of your back . Try changing your posture ?