This document provides an overview of perfect competition including: 1. Characteristics of perfect competition such as many small firms, homogeneous products, free entry and exit. 2. Assumptions of perfect competition including perfect information and mobility of resources. 3. How firms operate at minimum average total cost and make only normal profits in both the short-run and long-run in a perfectly competitive market. 4. Criticism of the perfect competition model and its limited real-world applicability. 5. An example of international trade and a case study on the US watch market.