How GitHub Contributing.md Contributes to Contributors

To make open source software development successful, acquiring contributors from outside is an important factor. However, despite the need for external contributions, many projects have disappeared without being able to acquire contributors. GitHub, an Internet hosting service for the purpose of open software development, is widely used for research projects of related topics. However, different from the original research purpose, many pseudo-projects use GitHub for other purpose such as a free file storage. There existence disturbs the analysis of research projects. It is necessary to exclude them. In this research, we focused on the contribution file (contributing.md / contributing.txt) which is the common file of GitHub project. We use contribution file to judge whether the project intend social coding depending on its existence. We also plan to analyze the effect of its contents on acquiring contributors. To do so, we extract information of 459 projects from GitHub archive, and analyze the contents of contribution file and relationship between the contents and acquired contributors.