Final answer:
The book 'Competitive Strategy: Techniques for Analyzing Industries and Competitors' is about the concept of perfect competition and decisions made by firms in perfectly competitive markets.
Step-by-step explanation:
The subject of this question is Business. The book, 'Competitive Strategy: Techniques for Analyzing Industries and Competitors,' discusses the concept of perfect competition and how firms operating in perfectly competitive markets make decisions regarding production, profits, and staying in business. The book focuses on the market structure of industries and explores other industry types like Monopoly, Monopolistic Competition, and Oligopoly.