The credit network produces both positive and negative externalities, which contribute the decrease and increase of transaction cost respectively.
信用网络产生了正外部性和负外部性，分别导致了交易成本的减少和增加。
The credit network produces both positive and negative externalities, which contribute the decrease and increase of transaction cost respectively.
信用网络产生了正外部性和负外部性，分别导致了交易成本的减少和增加。
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