One way of understanding the subfield of public policy is to bisect it into broad branches. One branch is substantive, processual, descriptive, and objective. That is, it is concerned with substance of some issue (such as the environment, crime, or whatever ), and produces books and articles that often are titled “ The Politics of …” some substantive area. It focuses on the process of a public policy—that is, how the policy process works in a specific field—and attempts to describe that process objectively. This is the branch dominated by political scientists, and we call it incrementalist paradigm of public policymaking and implementation.