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英文文献：On Positive Externality
英文文献作者：Vorotnikova, Ekaterina,Schmitz, Andrew
英文文献摘要：
This paper fills the gap of modeling positive externality cases when private marginal cost is higher than social marginal cost. Within this unique type of divergence of marginal costs two cases are scrutinized: social marginal benefit being higher than private marginal benefit, and vice versa, social marginal benefit being lower than private marginal benefit. Empirical case in study is commercial shellfish farming firm on the West Coast. The study shows that contrary to popular beliefs correcting for positive externalities does not always result in a positive welfare; however, it does result in a positive welfare for the study case of the particular shellfish farm.
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