Observational Studies is a peer-reviewed journal that publishes manuscripts on all aspects of observational studies, including, but not limited to, study protocols for observational studies, methodologies for observational studies, descriptions of data sets for observational studies, software for observational studies and analyses of observational studies. For further details, see the journal's aims and scope.

The journal is open access and has no publication charges. Papers are posted to the website rapidly when accepted.

April 27, 2021

Protocol — Evaluating the Effect of ACA Medicaid Expansion on Mortality During the COVID-19 Pandemic Using County-level Matching (with addendum)

By Charlotte Z. Mann, Ben B. Hansen, Lauren Gaydosh, Timothy Lycurgus

mann_et_al_protocol ADDENDUM_lycurgus_hansen_mann_protocol

Applications and Case Studies Methodology Study Protocols

March 24, 2021

Randomization Tests to Assess Covariate Balance When Designing and Analyzing Matched Datasets

By Zach Branson

branson_Rand_TestMatched_Data_published

Methodology Study Protocols

February 1, 2021

A Difference-in-Difference Study Evaluating the Effect of Minimum Wage Policy on Body Mass Index and Related Health Behaviors

By Caitlin Caspi, Molly De Marco, Thomas Durfee, Abayomi Oyengua, Leah Chapman,Julian Wolfson, Samuel Myers, Jr., Lisa Harnack

caspi_obs_studies_published

Methodology Study Protocols

January 22, 2021

ivmodel: An R Package for Inference and Sensitivity Analysis of Instrumental Variables Models with One Endogenous Variable

By Hyunseung Kang, Yang Jiang, Qingyuan Zhao, and Dylan Small

ObsStudy_published

Applications and Case Studies Methodology

September 15, 2020

Constructing a More Closely Matched Control Group in a Difference-in-Differences Analysis: Its Effect on History Interacting with Group Bias

By Pallavi Basu and Dylan Small

basu_small_2020

Applications and Case Studies Methodology

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.