Abstract
Observational studies can address a wide variety of issues in medicine and public health. Targeted learning (TL) provides a framework for unbiased estimation of treatment effects using these data. TL relies on two core methodologies, targeted minimum loss-based estimation (TMLE), an efficient double robust estimator, and data adaptive super learning. Collaborative TMLE (C-TMLE) is an extension of TMLE that is particularly effective when there is a sparsity of information in the data. C-TMLE provides an automated approach to constructing parsimonious models for treatment and censoring mechanisms. These models are built in response to residual bias not addressed in an initial outcome regression. C-TMLE can stabilize estimates and reduce mean squared error in high dimensional and other sparse data settings.
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Gruber, S., van der Laan, M. (2018). Collaborative Targeted Maximum Likelihood Estimation to Assess Causal Effects in Observational Studies. In: Peace, K., Chen, DG., Menon, S. (eds) Biopharmaceutical Applied Statistics Symposium . ICSA Book Series in Statistics. Springer, Singapore. https://doi.org/10.1007/978-981-10-7826-2_1
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