This document provides an overview of different approaches to studying public policy, including elite theory, group theory, and rational choice theory. It discusses the key assumptions of each approach. Elite theory posits that public policy primarily reflects the interests and values of a ruling elite class, rather than the masses. Group theory views public policy as the result of competition and compromise between various interest groups in society. Rational choice theory assumes that policymakers make decisions by rationally pursuing their self-interest. The document examines the strengths and limitations of each theoretical perspective in understanding the policymaking process.