Paul Chase, the journals operations manager for Penn Press Journals, writes:

We are excited to announce that Observational Studies has partnered with the University of Pennsylvania Press to publish the journal twice per year. We will continue to provide the same level of outstanding scholarship and analysis of the field, while taking advantage of the professional publishing services that the Press can provide. 

Please bookmark the new URL, and watch for updates and new issues.

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.

Project MUSE is now hosting Commentaries on Leo Breiman’s paper “Statistical Modeling: The Two Cultures” (Statistical Science, 2001, 16(3), 199-231) as a Special Issue of Observational Studies.

The peer-review submission process will now be online and Observational Studies is now accepting submissions. See Author Guidelines for more information or email the editors at All manuscripts should be submitted via the Scholastica online submission system,