Do Good, Stay Longer? Temporal Patterns and Predictors of Newcomer-to-Core Transitions in Conventional OSS and OSS4SG

2026-01-30

AI Summary

This study addresses the sustainability challenge in open-source software (OSS) projects—namely, the difficulty of converting new contributors into core members—and reveals that OSS for Social Good (OSS4SG) projects exhibit markedly different dynamics. Analyzing behavioral data from 3.5 million commits and over 90,000 contributors across 375 projects (190 OSS4SG and 185 traditional OSS), we employ large-scale temporal modeling, survival analysis, and feature importance assessment to demonstrate that OSS4SG projects achieve 2.2 times higher contributor retention and a 19.6% higher core member conversion rate. Notably, we identify a “late spike” contribution pattern that significantly accelerates core membership attainment, requiring only 21 weeks—substantially faster than the 51–60 weeks associated with the conventional “early spike” pattern—thereby challenging the prevailing assumption that early intensive contributions are most effective for integration.

Technology Category

• Cognitive Modeling & Cognitive Systems: Neural Spike Coding
• Data Mining & Knowledge Management: Mining of Spatial, Temporal or Spatio-Temporal Data
• Application Domains: Humanities & Computational Social Science

Application Category

• Responsible Web: Sustainability and climate impact of web technologies
• Security and Privacy: Large-scale security measurements
• Web Mining and Content Analysis: Content-based information diffusion

Abstract

Open Source Software (OSS) sustainability relies on newcomers transitioning to core contributors, but this pipeline is broken, with most newcomers becoming inactive after initial contributions. Open Source Software for Social Good (OSS4SG) projects, which prioritize societal impact as their primary mission, may be associated with different newcomer-to-core transition outcomes than conventional OSS projects. We compared 375 projects (190 OSS4SG, 185 OSS), analyzing 92,721 contributors and 3.5 million commits. OSS4SG projects retain contributors at 2.2X higher rates and contributors have 19.6% higher probability of achieving core status. Early broad project exploration predicts core achievement (22.2% importance); conventional OSS concentrates on one dominant pathway (61.62% of transitions) while OSS4SG provides multiple pathways. Contrary to intuition, contributors who invest time learning the project before intensifying their contributions (Late Spike pattern) achieve core status 2.4-2.9X faster (21 weeks) than those who contribute intensively from day one (Early Spike pattern, 51-60 weeks). OSS4SG supports two effective temporal patterns while only Late Spike achieves fastest time-to-core in conventional OSS. Our findings suggest that finding a project aligned with personal values and taking time to understand the codebase before major contributions are key strategies for achieving core status. Our findings show that project mission is associated with measurably different environments for newcomer-to-core transitions and provide evidence-based guidance for newcomers and maintainers.

Problem

• open source software
• newcomer retention
• core contributor transition
• OSS4SG
• sustainability

Innovation

• OSS4SG
• newcomer-to-core transition
• temporal contribution patterns
• open source sustainability
• Late Spike pattern