Law
Ex Ante Regulation vs. Ex Post Liability in Environmental Law
Quick fact
Many environmental laws combine both approaches: ex ante regulations set binding limits on pollution before any harm occurs, while ex post liability rules hold polluters financially responsible for damage they cause—creating a double layer of protection.
Why this is interesting
If a factory pollutes a river and sickens a town, is it better to punish the factory after the harm, or to stop it from polluting in the first place? The law does both, but the choice shapes how we protect the environment.