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Hello, Has anyone written R functions for applying self-controlled case series methods (http://statistics.open.ac.uk/sccs/). In fact only thing needed is to modify glm function to allow absorption of effect. Eg. in Poisson model individual effect is used as factor, but it is considered as nuisance term where parameter estimates are not needed. Could anyone point how absorbing individual

Hello, Does anyone know if there is a command in R similar to "xtpoisson" in STATA? I want to fit a conditional fixed-effects Poisson model and maximize a conditional likelihood, so I need something similar to "clogit" which is used for logistic regression models. Many thanks Mounia Hocine [[alternative HTML version deleted]]