In this Issue

Table of Contents

Introduction to Observational Studies and the Reprint of Cochran’s paper “Observational Studies” and Comments

Dylan S. Small
pp. 124-125
DOI: https://doi.org/10.1353/obs.2015.0009
open access

Observational Studies

William G. Cochran
pp. 126-136
DOI: https://doi.org/10.1353/obs.2015.0010
open access

William G. Cochran and the 1964 Surgeon General’s Report

Norman Breslow
pp. 137-139
DOI: https://doi.org/10.1353/obs.2015.0011
open access

The Inheritance bequeathed to William G. Cochran that he willed forward and left for others to will forward again: The Limits of Observational Studies that seek to Mimic Randomized Experiments

Thomas D. Cook
pp. 141-164
DOI: https://doi.org/10.1353/obs.2015.0012
open access

Design and interpretation of studies: relevant concepts from the past and some extensions

David R. Cox, Nanny Wermuth
pp. 165-170
DOI: https://doi.org/10.1353/obs.2015.0013
open access

Comment on “Observational Studies”, by William G. Cochran

Stephen E. Fienberg
pp. 171-172
DOI: https://doi.org/10.1353/obs.2015.0014
open access

Comment on Cochran’s “Observational Studies”

Joseph L. Gastwirth, Barry I. Graubard
pp. 173-181
DOI: https://doi.org/10.1353/obs.2015.0015
open access

The State of the Art in Causal Inference: Some Changes Since 1972

Andrew Gelman
pp. 182-183
DOI: https://doi.org/10.1353/obs.2015.0016
open access

Comment on Cochran’s “Observational Studies”

Ben B. Hansen, Adam Sales
pp. 184-193
DOI: https://doi.org/10.1353/obs.2015.0017
open access

A good deal of humility: Cochran on observational studies

Miguel A. Hernán
pp. 194-195
DOI: https://doi.org/10.1353/obs.2015.0018
open access

Lessons we are still learning

Jennifer L. Hill
pp. 196-199
DOI: https://doi.org/10.1353/obs.2015.0019
open access

Causal Thinking in the Twilight Zone

Judea Pearl
pp. 200-204
DOI: https://doi.org/10.1353/obs.2015.0020
open access

Cochran’s Causal Crossword

Paul R. Rosenbaum
pp. 205-211
DOI: https://doi.org/10.1353/obs.2015.0021
open access

Comment on Cochran’s “Observational Studies”

Donald B. Rubin
pp. 212-216
DOI: https://doi.org/10.1353/obs.2015.0022
open access

Comment on Cochran’s “Observational Studies”

Herbert L. Smith
pp. 217-219
DOI: https://doi.org/10.1353/obs.2015.0023
open access

Comment on “Observational Studies” by Dr. W.G. Cochran (1972)

Mark J. van der Laan
pp. 220-222
DOI: https://doi.org/10.1353/obs.2015.0024
open access

Observational Studies and Study Designs: An Epidemiologic Perspective

Tyler J. Vander Weele
pp. 223-230
DOI: https://doi.org/10.1353/obs.2015.0025
open access

Reflections on “Observational Studies”: Looking Backward and Looking Forward

Stephen G. West
pp. 231-240
DOI: https://doi.org/10.1353/obs.2015.0026
open access