Monopoly vs Perfect Competition
Monopoly and Perfect Competition are two Market Structures concepts in AP Economics that students often mix up. In short: monopoly is a monopoly is a market structure with a single seller producing a unique product with no close substitutes and significant barriers to entry. Meanwhile, perfect competition is perfect competition is a market structure with many small firms, identical products, free entry and exit, and perfect information. Here is how they compare side by side.
A monopoly is a market structure with a single seller producing a unique product with no close substitutes and significant barriers to entry.
A monopolist is the sole provider of a good or service and faces the entire market demand curve, allowing it to set price above marginal cost. Because of high barriers to entry, other firms cannot enter the market to compete.
Perfect competition is a market structure with many small firms, identical products, free entry and exit, and perfect information.
Firms in perfect competition are price takers and face a perfectly elastic demand curve. In the long run, economic profit is zero due to free entry and exit, leading to allocative and productive efficiency.