Single producer with a unique product and no close substitutes; price setter?

• A. Market structure
• B. Monopoly
• C. Rationing
• D. Perfect competition

Answer: (B)

Having the power to set price comes from being a single producer with a unique product and no close substitutes. When there’s only one supplier, consumers don’t have close alternatives, so the firm faces the whole downward-sloping demand for its product and can choose a price above marginal cost. The firm maximizes profit where marginal revenue equals marginal cost, and the corresponding price is read off the demand curve at that quantity. This combination—one seller, a unique product, and barriers to entry—characterizes a monopoly, which possesses price-setting power. By contrast, perfect competition has many firms selling identical goods and firms take the market price as given, so neither has the power to set price. Rationing describes a method of allocating scarce goods and isn’t about who sets price, and “market structure” is a broad label rather than the specific pricing behavior shown here.