A cost-effective policy is always socially efficient.
If a cost-effective policy results in a level of emissions that differs from the socially efficient level of emissions then it is not socially efficient.

Question

Quizplus · Accepted Answer

Just because a policy is cost-effective does not mean it will definitely result in the socially efficient level of emissions. If a cost-effective policy yields a level of emissions that is different from the socially efficient level, then it would not be socially efficient.

A Cost-Effective Policy Is Always Socially Efficient