The trouble with evaluating regulations is that if you attribute positive effects directly to government regulations (e.g. "regulation X saved Y lives by keeping dangerous drug Z off the market"), it's only fair to also attribute negative effects directly to government regulations (e.g. "regulation X killed Y people by delaying the introduction of miracle drug Z to the market"). And even beyond that, you also need to analyze the costs of the regulatory system itself if you want to make conclusions about the net effects of the regulatory system as a whole.