One- and two-year master’s degree programs in public policy or public administration prepare students to lead.
https://www.hks.harvard.edu/admissions-aid/masters-program-admissions/how-apply
Full-time PhD programs in public, health, and social policy prepare candidates for careers in academia, research, or policymaking.
https://www.hks.harvard.edu/admissions-aid/doctoral-program-admissions/how-apply