This PhD-level course covers empirical topics in Personnel Economics, the branch of labor economics that studies labor markets inside firms. The course examines how firms hire, screen, pay, evaluate, promote, manage, organize, and retain workers, and how these choices affect productivity, inequality, careers, and worker welfare. As such, the course naturally complements both the labor-economics sequence offered by the Department of Economics and the organizational-economics sequence offered by the MECS program (MECS 570-1 and MECS 570-2): it complements the former by bringing within-firm evidence to core labor questions, and the latter by emphasizing empirical evidence and research design. Meetings will combine lectures on the foundational topics in the field with in-class discussions of recent papers, with the goal of helping students develop their own research ideas.