So sánh phương pháp

	Nghiên cứu so sánh theo chiều dọc	Nghiên cứu bảng
Lĩnh vực	Thiết kế nghiên cứu	Thiết kế nghiên cứu
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Mid-20th century onward; systematized in sociological and developmental research by the 1960s–1970s	1970s-1980s (econometric formalization); earlier social survey use from 1940s
Người khởi xướng	Developed across social science and educational research traditions; no single originator	Social science and econometric traditions; systematized by Cheng Hsiao and others from the 1970s-1980s
Loại	Quantitative observational research design	Quantitative longitudinal observational design
Công trình gốc	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292	Hsiao, C. (2003). Analysis of Panel Data (2nd ed.). Cambridge University Press. ISBN: 978-0521522717
Tên gọi khác	longitudinal comparative design, comparative panel design, multi-group longitudinal study, longitudinal cross-national comparison	panel study, panel survey, longitudinal panel, repeated-measures panel
Liên quan	2	3
Tóm tắt	Comparative longitudinal research tracks two or more distinct groups across multiple time points, enabling researchers to observe how outcomes change over time and whether those trajectories differ between groups. By combining the temporal depth of longitudinal design with the between-group contrast of comparative design, this approach can detect not only whether groups differ at any single moment but also whether they diverge, converge, or evolve at different rates across the observation window.	Panel research is a quantitative longitudinal design in which the same individuals, organizations, or other units are measured repeatedly across two or more time points. Unlike cross-sectional surveys that capture a single snapshot, a panel tracks change within units, enabling researchers to separate genuine within-unit change from between-unit differences and to model causal dynamics over time.