Firm-Sponsored Developers in Open Source Software Projects by Dirk Homscheid

Author:Dirk Homscheid
Language: eng
Format: epub
ISBN: 9783658314781
Publisher: Springer Fachmedien Wiesbaden

Figure 6.5In-Degree Distribution

The plots show that:The highest activity as measured by the out-degree is achieved by company developers, then hobbyists, and the lowest activity is given by developers from research institutions and universities.

The measure of importance, the in-degree, correlates and shows the same pattern as for the activity: company developers have the most importance, then hobbyists, and finally developers from research institutions and universities.

These results are consistent with the observation that the measures of activity and importance correlate. To verify the statistical significance of our results, we perform pairwise Mann-Whitney U tests, testing whether values of each statistic for one type of developer are statistically different from the values for another group. The group differences are statistically significant (p < 0.05; company developers vs. hobbyists: p < 0.10 for the out-degree), except for developers from companies vs. developers from research institutions and hobbyists vs. developers from research institutions for the in-degree and out-degree; developers from universities vs. developers from research institutions for the out-degree.

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