Design and analysis of observational studies CRAN Task View: ExperimentalDesign (http://CRAN.R-project.org/view=ExperimentalDesign) The osDesign serves for planning an observational study. Currently, functionality is focused on the two-phase and case-control designs. Functions in this packages provides Monte Carlo based evaluation of operating characteristics such as powers for estimators of the components of a logistic regression model. Software Depends: R (>= 2.10) Sebastien Haneuse <shaneuse@hsph.harvard.edu> Sebastien Haneuse, Takumi Saegusa, Nilanjan Chaterjee, Norman Breslow GPL (>= 3) 2012-05-23 application/tgz http://CRAN.R-project.org/package=osDesign