Private actors are important for urban climate action, because the public sector can control the carbon footprint of a city only partly. Public-private partnerships have been created through different voluntary approaches, such as city-level voluntary networks for companies with the aim to engage private actors in climate change mitigation and to support learning processes by bringing different actors together. If these processes are to happen, network members should connect with each other through voluntary networking activities. These connections can be studied using methods from network science. As a case example, we study the event-participation-based structures of the Climate Partners network of the City of Helsinki between 2011 and 2018, and develop an index to measure whether active event participation by a company is associated with taking more ambitious mitigation measures. The results show that the network manages to bring together companies from different fields but has difficulties with engaging them and encouraging ambitious climate goals. Our results can help to further develop networking activities. The tools we develop and share allow the replication of the analysis for other data sets, offering a basis for a comparative analysis of different networks. This opens new horizons for studying public-private networking and its effects.

私人行为者对城市气候行动很重要，因为公共部门只能部分控制城市的碳足迹。公私伙伴关系是通过不同的自愿方法建立的，例如公司的城市级自愿网络，旨在让私营部门参与减缓气候变化，并通过将不同的参与者聚集在一起来支持学习过程。如果要发生这些过程，网络成员应该通过自愿的网络活动相互联系。可以使用网络科学的方法来研究这些联系。作为一个案例，我们研究了 2011 年至 2018 年间赫尔辛基市气候合作伙伴网络的基于事件参与的结构，并制定一个指数来衡量公司积极参与活动是否与采取更雄心勃勃的缓解措施有关。结果表明，该网络设法将来自不同领域的公司聚集在一起，但在吸引他们和鼓励雄心勃勃的气候目标方面存在困难。我们的研究结果有助于进一步开展网络活动。我们开发和共享的工具允许复制其他数据集的分析，为不同网络的比较分析提供基础。这为研究公私网络及其影响开辟了新的视野。我们的研究结果有助于进一步开展网络活动。我们开发和共享的工具允许复制其他数据集的分析，为不同网络的比较分析提供基础。这为研究公私网络及其影响开辟了新的视野。我们的研究结果有助于进一步开展网络活动。我们开发和共享的工具允许复制其他数据集的分析，为不同网络的比较分析提供基础。这为研究公私网络及其影响开辟了新的视野。