BIOSTATISTICS SEMINAR SERIES
Ying Zhang, Ph.D.
Professor & Director of Biostatistics Education, Department of Biostatistics, Indiana University
Title: Model-Free Causal Inference in Observational Studies
Abstract: Causal inference is a key component for comparative effectiveness research in observational studies. The inverse-propensity weighting (IPW) technique and augmented inverse-propensity weighting (AIPW) technique, which is known as a double-robust method, are the common methods for making causal inference in observational studies. However, these methods are known not stable, particularly when the models for propensity score and the study outcome are wrongly specified. In this work, we propose a model-free approach for causal inference. While possessing standard asymptotic properties, this method also enjoys excellent finite sample performance and robustness. Simulation studies were conducted to compare with the well-known IPW and AIPW methods for causal inference. A real-life example from an ongoing Juvenile Idiopathic Arthritis Study was applied for the illustration of the proposed method.
Bio3 Seminar Series sponsored by
Department of Biostatistics, Bioinformatics & Biomathematics (DBBB)
Friday, September 14, 2018 at 10:00am to 11:00am
New Research Building, New Research Auditorium
3800 Reservoir Road, N.W., Washington