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	Grounded Theory Comparativa Classica	Studio di caso comparativo
Campo	Qualitativo	Qualitativo
Famiglia	Process / pipeline	Process / pipeline
Anno di origine	1967 (classic GT); comparative application formalised 1970s–1990s	1984 (Yin); 1995 (Stake)
Ideatore	Barney G. Glaser & Anselm L. Strauss (classic GT); comparative design extended by Glaser	Robert K. Yin; Robert E. Stake
Tipo	Qualitative theory-building design	Qualitative / mixed research design
Fonte seminale	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine. ISBN: 978-0202302607	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
Alias	Glaserian comparative grounded theory, classic GT comparative design, comparative CGT, multi-site classic grounded theory	cross-case study, multi-site case study, multiple case study design, comparative case analysis
Correlati	6	4
Sintesi	Comparative classic grounded theory is a qualitative research design that applies Glaser and Strauss's original Glaserian grounded theory procedures across two or more deliberately selected comparison groups, settings, or time points. The constant comparative method — the analytical engine of classic GT — is extended systematically across sites so that the emerging substantive theory accounts for variation in the phenomenon across different contexts, populations, or conditions.	Comparative case study is a qualitative research design in which two or more bounded cases are studied in depth and then systematically compared to identify similarities, differences, and patterns across contexts. Rooted in Yin's replication logic and Stake's multiple case framework, it is particularly suited to questions that ask how or why a phenomenon unfolds differently — or similarly — across distinct settings, populations, or time periods.