The Evolution of the R Software Ecosystem

Software ecosystems form the heart of modern companies´ collaboration strategies with end users, open source developers and other companies. An ecosystem consists of a core platform and a halo of user contributions that provide value to a company or project. In order to sustain the level and number of high-quality contributions, it is crucial for companies and contributors to understand how ecosystems tend to evolve and can be maintained successfully over time. As a first step, this paper explores the evolution characteristics of the statistical computing project GNU R, which is a successful, end-user programming ecosystem. We find that the ecosystem of user-contributed R packages has been growing steadily since R´s conception, at a significantly faster rate than core packages, yet each individual package remains stable in size. We also identified differences in the way user-contributed and core packages are able to attract an active community of users.