1. Free/Libre and Open Source Software Rishab Aiyer Ghosh Ruediger Glott Bernhard Krieger Gregorio Robles - Developer Survey - International Institute of Infonomics, Maastricht

2. Findings: Developer Survey Global (random sample, web-based) 2700 responses, verified against software source code authorship Detailed questionnaire: 42 questions on demography, motivation, earning/ employment

3. Current Age and Starting Age of F/LOSS Developers

4. Years of Experience in F/LOSS

5. Professional Background

6. Gross Income of Developers

7. Hours per Week Spent on Development

8. Total Number of F/LOSS Projects

9. Leadership Experience

10. Contacts to other Developers

11. Main Income from Software?

12. Rewards from F/LOSS Activity

13. Reasons to Join and to Stay

14. Open Source or Free Software?

15. Degrees of Activity in F/LOSS

16. Activity and Age Structure

17. Experience and Activity

18. Activity and Professional Background

19. Activity and Reasons to Start F/LOSS

20. Degree of Activity and Reasons to Continue with F/LOSS

21. Reasons to Start and to Continue with F/LOSS – Low and High Activity Level

22. Activity in F/LOSS and Development of Proprietary Software

23. Activity in F/LOSS and Time Investment

24. Activity and Gross Income

25. Software as Source of Main Income and Degree of Activity

26. Degree of Activity in F/LOSS and Monetary Rewards

27. Activity in F/LOSS and Self-Assignment to OSS- or FS-Community

28. Reliability and Validity of Data Random Sample Self-Posting of Questionnaire Identification of Subsample Multi-perspective targeting of research questions Fake Answers

29. Limitation of the Results One-channeled communication stream Problem of Content Definition Missing Answering Context Limited Variety of Answers  Qualitative Research Methodology

30. References FLOSS report: www.infonomics.nl/FLOSS/report/ www.infonomics.nl/FLOSS/report/ FLOSS workshop, Brussels, Oct 14: www.infonomics.nl/FLOSS/workshop/ www.infonomics.nl/FLOSS/workshop/