Abstract: The flow of data elements reflects the transmission of market supply and demand signalsThe essence of traffic competition is the competition for trading opportunitiesThe core function of digital platform is circulation，which focuses on improving the efficiency of information matching to compete for attention，which determines that the scope of matching objects can be infiniteHowever，the definition of relevant market focusing on production will be difficult to define the “benchmark product” because the matching market spans multiple production fields，so it is difficult to determine the attentionrelated market represented by trafficBased on the “connection-one structure”perspective，this paper argues that there are three roles in the digital ecology: center，sub-center and periphery，and further strengthens the pattern of the center monopolizing the traffic entrance from the three dimensions of “platform-data-algorithm”(PDA paradigm)，forming a “center-periphery” dependency exploitation system in which the center is to the sub-center and the subcenter is to the peripheral cost in turnIn this paper，three regulatory approaches are proposed for the traffic monopoly with the purpose of controlling the distribution of trading opportunitiesFirst，the relevant time market should be highlighted in the framework of antitrust analysisSecond，expand the connotation of transaction counterpart in the anti-monopoly law，and realize the interconnection between the structural platform and the connected platform with the goal of cross-ecological opening；Third，introduce the principle of open platform，define the necessary facilities for structural platform，and build the oligopoly competition rules of digital platform

Key words: PDA paradigm, relevant market, core and periphery theory, ecosystem monopoly, structural power

摘要： 数据要素的流动反映了市场供需信号的传递，流量竞争的本质是交易机会的争夺。数字平台的核心功能是流通，其以提高信息撮合效率为抓手进行注意力竞争，这决定了撮合对象的范围可以无限广阔，关注生产的相关市场界定则会因撮合市场跨多个生产领域而难以界定“基准产品”，因此流量代表的注意力相关市场难以测定。基于“联系一结构”视角，本文认为数字生态中存在中心、次中心和外围这三种角色，并从“平台-数据-算法”（PDA范式）三个维度进一步固化中心独占流量入口的格局，形成了中心对次中心，次中心对外围成本依次转移的“中心一外围”依附剥削体系。针对以控制交易机会分配为目的的流量垄断，本文提出三条规制路径：第一，在反垄断分析框架中突出相关时间市场；第二，拓展反垄断法中交易相对人的内涵，实现结构性平台对联系性平台跨生态开放为目标的互联互通；第三，导入开放平台原则，对结构性平台划定必需设施，构建数字平台的寡头竞争规则。

关键词: PDA范式, 相关市场, 中心-外围, 生态垄断, 结构性权力