The emerging grassroots party Barcelona en Comú won the 2015 Barcelona City Council election. This candidacy was devised by activists involved in the Spanish 15M movement to transform citizen outrage into political change. On the one hand, the 15M movement was based on a decentralized structure. On the other hand, political science literature postulates that parties develop oligarchical leadership structures. This tension motivates to examine whether Barcelona en Comú preserved a decentralized structure or adopted a conventional centralized organization. In this study we develop a computational methodology to characterize the online network organization of every party in the election campaign on Twitter. Results on the network of retweets reveal that, while traditional parties are organized in a single cluster, for Barcelona en Comú two well-defined groups co-exist: a centralized cluster led by the candidate and party accounts, and a decentralized cluster with the movement activists. Furthermore, results on the network of replies also shows a dual structure: a cluster around the candidate receiving the largest attention from other parties, and another with the movement activists exhibiting a higher predisposition to dialogue with other parties.

中文翻译：

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新兴运动党Barcelona enComú的在线网络组织。

新兴的草根政党巴塞罗那enComú赢得了2015年巴塞罗那市议会选举。这个候选资格是由参与西班牙15M运动的激进主义者设计的，旨在将公民的愤怒转变为政治变革。一方面，15M机芯基于分散式结构。另一方面，政治学文献假定政党发展寡头领导结构。这种紧张关系促使人们研究巴塞隆纳省保留了权力下放的结构还是采用了传统的集中组织。在这项研究中，我们开发了一种计算方法来表征Twitter竞选活动中每一方的在线网络组织。转推网络上的结果表明，尽管传统的政党组织在一个集群中，在巴塞隆纳，Comen共存在两个定义明确的小组：一个由候选人和政党领导的集中小组，以及与运动积极分子一起的分散小组。此外，答复网络上的结果还显示出双重结构：候选人周围的集群受到其他政党的最大关注，另外一个运动积极分子表现出与其他政党对话的更高倾向。