本文认为,邮政产业的信函传递网、实物配送网、邮政汇兑网不存在显著的纵向关联;长途信函传递网具有一定的规模经济与较弱的范围经济性,而实物配送网与邮政汇兑网则不具有进入与退出的壁垒,邮政产业不具有自然垄断形成的条件。这一理论的实践含义是邮政产业的重组改革不宜简单采用电信重组的以拆分为主要形式的反托拉斯政策,而应对邮政实行三网分离的分类管制政策。 This paper argues that there is no significant vertical relationship between the mail transmission network, the physical distribution network and the postal remittance network in the postal industry. The long-distance mail delivery network has some economies of scale and a weak range economy. However, the physical distribution network and the postal remittance network Do not have barriers to entry and exit, the postal industry does not have the conditions for the formation of natural monopoly. The practical implication of this theory is that the restructuring of the postal industry should not simply adopt the split-based antitrust policy of telecommunications restructuring. Instead, it should adopt a three-network separation control policy for postal services.