Why might a government choose to regulate emissions directly rather than tax them?

• A. Regulation can set a concrete standard when pollution has urgent or uncertain external costs; ensures minimum quality.
• B. Taxes always better.
• C. Regulation is cheaper to implement.
• D. Regulation can target unrelated industries.

Answer: (A)

Direct regulation (command-and-control) offers a concrete emission standard, so policymakers can guarantee a minimum level of environmental quality. This is especially important when the social costs of pollution are urgent or the exact damages are uncertain, because it provides a clear, enforceable limit that all emitters must meet. In these situations, having a definite target helps ensure that pollution is controlled to a chosen threshold rather than leaving it to price signals to achieve an uncertain outcome.

While taxes can give firms flexibility to reduce emissions in the most cost-effective way, they rely on correct estimates of marginal damages and on firms’ responses to price changes. If those estimates are uncertain or if rapid improvement is needed, a fixed standard can be more reliable. The other options aren’t as fitting: saying regulation is cheaper to implement isn’t guaranteed, since monitoring and enforcement can be costly; and suggesting regulation can target unrelated industries isn’t a defining advantage of regulation, since the goal is typically to address the polluting activity itself.