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Chapter 68: Panel Design
Panel designs represent one type of prospective longitudinal design. Longitudinal designs are those that include a time dimension so that the extent of change over time can be assessed. The time dimension can be obtained either prospectively or retrospectively. A retrospective longitudinal design is one that collects data about several time points at a single point of time by looking backwards. A prospective study collects data about several time points at several time points. Such a study will begin with baseline data collection and then collect further data in future waves so that the extent and mechanisms of change can be assessed.
Prospective longitudinal studies can be based on different samples at each wave or can use the same sample at each wave. ...