Deadweight loss measures the loss in society's welfare that occurs because a monopolist can earn profits without the concern of new firms entering its industry.

Deadweight Loss

The reduction in total surplus that results from a market distortion, such as a tax, subsidy, or price control.

Society's Welfare

A measure of the overall well-being and quality of life of the members of a society, often considered in economic terms but also including factors like health, education, and environmental quality.

Monopolist

An entity that is the sole provider of a particular product or service in the market, having significant control over pricing.