The document discusses definitions of public policy from various scholars and experts. It begins by summarizing Thomas Dye's definition of public policy as "anything a government chooses to do or not to do." It then examines definitions provided by other scholars, highlighting key elements of each such as the role of goals, programs, decisions, and effects. The document also discusses why public policy is studied - for scientific understanding of society, problem solving, and making policy recommendations. It explores how policy analysis can be used to better understand specific policies and their impacts through rigorous inquiry and research.