Research on the Negative Externalities Evaluation for the Development of Weathered Crust Elution-Deposited Rare Earth Ores

Table 2

Comparison of quantitative evaluation methods of the negative externality.

Evaluation methods	Theoretical basis	Data volume	Complexity	Applicability
Market value method	Theory of supply and demand	Medium	Simple	Strong
Shadow engineering method	Ecological service theory	Small	Simple	Strong
Human cost method	Wage theory	Medium	Complex	Weak
Opportunity cost method	Utility value	Small	Simple	Strong
Contingent valuation method	Consumer preference theory	Big	General	Medium