中国烟草学报

【背景和目的】大户控制小户套购卷烟，关系到烟草专卖专营渠道管理，是烟草专卖监管研究的重点方向之一。本研究引入社会网络分析，旨在从异常关联网络中精准定位套购团伙及其关键主体，为从结构上打击地下违法卷烟交易网络提供新视角。【方法】以零售户使用相同ID订货为基础构建零售户异常关联网络，采用Louvain算法开展社团检测，并结合网络拓扑结构与社团属性，以识别关联网络中的核心节点、中介节点及潜在团伙。【结果】通过历史涉案数据对比验证分析，两类节点的涉案率分别达14.3%和20.7%，显著高于随机节点。节点移除实验表明，核心节点移除可使社团密度最大降低36.53%；中介节点移除导致社团最多碎裂为12个孤立子图。【结论】实验证明，本研究提出的通过Louvain分析算法，能有效揭示和瓦解大户控制小户套购卷烟网络结构，为烟草专卖监督提供了高效、可量化的理论和技术支持。

[Background] The manipulation of small retailers by large retailers to scalp cigarettes is closely related to the management of tobacco monopoly and exclusive distribution channels， and it is one of the key research directions in tobacco monopoly supervision. This study introduces social network analysis， aiming to accurately locate cigarette scalping syndicates and their key entities from abnormal association networks， and provide a new perspective for structurally combating underground illegal cigarette trading networks. [Methods] An abnormal association network of retailers was constructed based on retailers using the same ID for cigarette ordering. The Louvain algorithm was employed to conduct community detection. By integrating network topology and community attributes， core nodes， betweenness nodes， and potential gangs within the association network were identified. [Results] Through comparative verification and analysis of historical case-related data， the case involvement rates of the two types of nodes reached 14.3% and 20.7% respectively， which were significantly higher than those of randomly selected nodes. The node removal experiments demonstrated that removal of core nodes could reduce the community density by a maximum of 36.53%; the removal of betweenness nodes led to the fragmentation of the community into a maximum of 12 isolated subgraphs. [Conclusion] Experiments confirm that the method based on the Louvain analysis algorithm proposed in this study can effectively reveal and disrupt the network structure where large retailers control small retailers to scalp cigarettes， providing efficient and quantifiable theoretical and technical support for tobacco monopoly supervision.