Observational Studies invites submission of comments on Leo Breiman’s paper “Statistical Modeling: The Two Cultures” (Statistical Science, 2001, 16(3), 199-231). Breiman’s paper will be reprinted on its 20^th anniversary along with comments. The deadline for submitting comments is March 5, 2021.

The 2020 Cochran award for best paper published in Observational Studies between 2015-2019 is awarded to Giancarlo Visconti and Jose Zubizarreta for their paper “Handling Limited Overlap in Observational Studies with Cardinality Matching.” The next Cochran award will be given in 2023 for a paper published between 2020-2022.

Patient Centered Hazard Ratio Estimation Using Principal Strati cation Weights: Application to the NORCCAP Randomized Trial of Colorectal Cancer Screening

Targeted Learning for Pre-Analysis Plans in Public Health and Health Policy Research

Simulation-Extrapolation for Estimating Means and Causal Effects with Mismeasured Covariates

The non-zero mean SIMEX: Improving estimation in the face of measurement error

Patient Centered Hazard Ratio Estimation Using Principal Stratication Weights: Application to the NORCCAP Randomized Trial of Colorectal Cancer Screening