When it comes to monopolies, public policy often involves direct government regulation to ensure fair competition and protect consumer welfare. This approach recognizes that in some cases, particularly with natural monopolies, breaking up the firm may not be economically efficient. it comes to regulation, public policy toward monopolies involves the government stepping in to oversee and control the practices of monopolistic firms directly to ensure fair competition and protect consumers.

Regulation can take various forms:

1. Price regulation: Caps or rate-of-return limits to prevent excessive pricing.
2. Quality standards: Enforced to maintain service quality in absence of competitive pressure.
3. Universal service requirements: Mandates to serve all market segments, including less profitable areas.
4. Investment and innovation requirements: Targets for capital investment or R&D to ensure ongoing innovation and improvement.

The rationale behind regulatory policies is to balance the efficiency and economies of scale that monopolies can achieve with the need to prevent abuse of market power. By imposing regulations, governments aim to mimic the competitive outcomes of a market economy, ensuring that prices remain fair, service quality is maintained, and innovation is not stifled. Regulatory bodies or commissions, such as the Federal Communications Commission (FCC) in the United States, are often established to monitor and enforce these policies. These bodies typically employ economic analysis to inform their decisions, considering factors such as cost structures, demand elasticity, and potential impacts on consumer and producer surplus.