Given what we have learned about the possible types and uses of policy analysis, what would be the difference between how a policy advocate, political advocate, and an objective technician (profession

Given what we have learned about the possible types and uses of policy analysis, what would be the difference between how a policy advocate, political advocate, and an objective technician (professional policy analyst) would treat an issue like Hydraulic Fracturing? What characteristics of the issues would each kind of analyst emphasize? Which would they ignore? Why?