Economics - Microeconomics - Market structures - oligopoly and monopolistic competition - Name That Market Structure

Students sort 8 real-world markets into 'Oligopoly' (few dominant firms) vs 'Monopolistic Competition' (many firms, differentiated products). Oligopoly: 'Smartphone OS (iOS, Android)', 'Airlines on a route (3-4 choices)', 'Soft drinks (Coke, Pepsi, few others)', 'Auto manufacturers (10-15 globally)'