It holds that the production of commercial forest has positive externalities and its producers can't provide enough commercial forest truly required by the society under market failure.
该文认为商品林生产具有正的外部性，市场失灵使生产者将不能提供社会真正所需要的商品林数量。
2
There are some conflicts in mine-environment governance. The paper analyses detailedly economics root of mine-environment puzzle from externalities, Coase Theorem, production theory and game theory.
But problem is that production brings not only private return to enterprise but also negative externalities to society, both of which affect the increase of social welfare.