Producers play a disproportionately large role in influencing public regulation because they have a strong interest in matters that affect their specialized source of income

A market with a few large sellers is called

A) perfectly competitive. B) monopolistically competitive. C) a monopoly. D) an oligopoly.

The Clear Plastic Company's plant discharges large quantities of toxic chemicals into some groundwater sources. Residents in the surrounding area have higher medical bills because of Clear Plastic's pollution. These additional medical costs represent

A) a positive externality. B) a negative externality. C) the company's private costs. D) the neighboring families' external costs.