一句话：基于间歇性志愿服务模型调查 FLOSS 志愿者留存，发现社会规范、满意度与社区承诺正向影响留下意愿。
论文关注 FLOSS 项目中不频繁参与的间歇性志愿者为何留存。作者借用一般志愿服务研究中的 episodic volunteering 概念，构建包含五个关键构念的模型，假设其影响志愿者继续参与意愿。通过对 100 余名 FLOSS 间歇性志愿者的问卷调查评估模型，发现社会规范、满意度和社区承诺与留存意愿正相关，而心理社区感和贡献者收益动机不显著。进一步对未观测异质性进行探索性聚类，识别出满意型、经典型、社交型和义务型四类志愿者。基于结果，论文为项目管理间歇性志愿者、提升项目可持续性提出建议。
Successful Free/Libre and Open Source Software (FLOSS) projects incorporate both habitual and infrequent, or episodic, contributors. Using the concept of episodic volunteering (EV) from the general volunteering literature, we derive a model consisting of five key constructs that we hypothesize affect episodic volunteers' retention in FLOSS communities. To evaluate the model we conducted a survey with over 100 FLOSS episodic volunteers. We observe that three of our model constructs (social norms, satisfaction and community commitment) are all positively associated with volunteers' intention to remain, while the two other constructs (psychological sense of community and contributor benefit motivations) are not. Furthermore, exploratory clustering on unobserved heterogeneity suggests that there are four distinct categories of volunteers: satisfied, classic, social and obligated. Based on our findings, we offer suggestions for projects to incorporate and manage episodic volunteers, so as to better leverage this type of contributors and potentially improve projects' sustainability.