Two common drawbacks of Pigouvian subsidy mentioned in the literature are related to monetisation and measurement of social cost (Baumol) and…

Two common drawbacks of Pigouvian subsidy mentioned in the literature are related to monetisation and measurement of social cost (Baumol) and reciprocity of social cost (Coase).

What alternatives to Pigouvian taxes are proposed in the literature? Have any of such alternative measures been implemented in practice?