pt. 1. Generating theory by comparative analysis. Generating theory -- Theoretical sampling -- From substantive to formal theory -- The constant comparative method of qualitative analysis -- Clarifying and assessing comparative studies -- pt. 2. The flexible use of data. New sources for qualitative data -- Theoretical elaboration of quantitative data -- pt. 3. Implications of grounded theory. The credibility of grounded theory -- Applying grounded theory -- Insight and theory development