Kelle, U. (2014). Theorization from data. In U. Kelle (Ed.), SAGE handbook of qualitative data analysis (pp. 554–568). London: Sage.
Udo Kelle explores the relationship between theory and data in qualitative research, and addresses the potential conflict for researchers of between being open to developing new theory while also being cognizant of existing theory. He examines the logic of theory building and theory testing in qualitative research, illustrating the role of different types of theory in analysing qualitative data.