The Pacific Research Institute is not at all unbiased. I haven’t done my own independent research yet, but I will. From PRI’s website, they describe themselves as “The mission of the Pacific Research Institute (PRI) is to champion freedom, opportunity, and personal responsibility for all individuals by advancing free-market policy solutions. Since its founding in 1979, PRI has remained steadfast to the vision of a free and civil society where individuals can achieve their full potential. Put simply, public policy is too important to be left just to the experts. Individuals are the real decision makers when it comes to their schools, health care, and environment. PRI reinforces this ideal by providing you with the information, inspiration, and opportunity to make decisions about the daily issues that matter most to you. The Institute’s activities include publications, events, media commentary, legislative testimony, and community outreach.”
That’s a point of view many share, but I imagine it colors the conclusions they draw.