A doctorate is the highest academic degree a university can award. It takes years of advanced study and original research. The most common is the PhD, or Doctor of Philosophy, awarded in nearly every field from physics to literature. Professional doctorates like the EdD, MD, and JD follow different paths but carry the same title.

Earning a PhD usually means coursework, comprehensive exams, and a dissertation. The dissertation is a substantial piece of original research that contributes new knowledge to the field. Students defend it before a committee of experts. The process can take four to seven years, sometimes longer.

Not everyone with a doctorate becomes a professor. Graduates work in industry, government, nonprofits, and research institutes. In some fields, the academic job market is brutal. In others, a doctorate opens doors to high-level roles in biotech, data science, or policy.

Common types

• PhD: research doctorate in most fields
• EdD: Doctor of Education
• MD: Doctor of Medicine
• JD: Juris Doctor (law)
• DBA: Doctor of Business Administration