Reverse logistics has positive externality on account of its feature of quasi-public goods.

逆向物流具有准公共物品的特征，由此决定了它还具有正外部效应和负外部效应。

youdao

The positive externality of antidumping and "free ride" of enterprise lead to the negative-sum game.

由于反倾销具有正外部性，中国很多企业“搭便车”，造成反倾销的负数和博弈。

youdao

The construction and utilization of the stadium and gymnasium facilities of games have greater positive externality.

综合性大型体育赛事场馆设施的建设与使用具有较大的正外部性。

youdao

And while Eli may be correct that people who produce a lot of external value get rewarded in the long run, it would help if the economics field did a better job of rewarding positive externality generating behavior and of explicitly arguing for optimal social norms.

FORBES: Economists and the Public Good