A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Identifying causal relationships from observational data is not easy. Still, ...
Longitudinal data in biomedical studies often involve concomitant interventions in addition to the pre-specified repeatedly measured outcome and covariate variables. Since a concomitant intervention ...
Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 66, No. 2 (FEBRUARY 2017), pp. 295-311 (17 pages) In large multilevel studies effects of interest are often evaluated for ...
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