多选题:下列关于外部性的说法,正确的有(  )。

题目内容:
下列关于外部性的说法,正确的有(  )。 A.对于产生外部经济的生产者,私人收益小于社会收益
B.对于产生外部不经济的生产者,边际私人成本小于边际社会成本
C.产生外部经济的生产者,产出水平低于社会最优产出水平,造成产品的供给过少
D.产生外部不经济的生产者,产出水平就会大于社会最优产出水平,造成产品的供给过多
E.在完全竞争条件下,虽然存在外部性的影响,但整个经济的资源配置还是可能达到帕累托最优状态的

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