Maximizing both external and internal validity in longitudinal true experiments with voluntary treatments: The “combined modified” design
- 30 November 1996
- journal article
- Published by Elsevier in Evaluation and Program Planning
- Vol. 19 (4), 287-300
- https://doi.org/10.1016/s0149-7189(96)00029-8
Abstract
No abstract availableKeywords
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