These subjects explain public institutions, political ideas and the history behind present disputes. Graduates still need strong enough research methods to test a political explanation. Informed commentary or a persuasive essay is not the same as research.
Economics develops reasoning about rewards, pressures, trade-offs and numerical effects. Its models can sharpen a policy question. Researchers must also notice how public services work in practice and whose experience is hidden by a convenient average or money-based measure.
These subjects examine public services, place, inequality and how people experience systems. They often provide useful training in both interviews and statistics. The gap may be learning to turn a careful academic discussion into a clear finding for a live debate without erasing important differences.
Strong numerical training helps with surveys, public records, experiments and analysis that other researchers can repeat. Policy work adds the challenge of deciding what the available measure leaves out. You must explain uncertainty to readers who may want a simple verdict.
Close reading, an understanding of context and sustained argument are valuable when evidence is spread across laws, archives, interviews and disputed accounts. Their weaker ground is often study design and statistics. Researchers must make the route from source to conclusion explicit enough for somebody else to challenge or repeat.
Education, health, engineering and community-development subjects can stop a project misunderstanding the system it studies. They bring knowledge of classrooms, care, infrastructure or local institutions. Researchers must turn that perspective into questions evidence can answer, understand the limits of personal examples and remain open to a result their own field may not welcome.