Dear All, I have a dataset with a count variable which takes the values 0,1,2 and three other columns which include smoking, alcohol and bmi information (they are all categorical variables). I also have an exposure column which I am planning to use as an offset variable in my poisson model. I was wondering whether someone provide me with some information on how to write a code that will enable me to decide which is the best fitted model using the BIC criterion? I would like the code to look among all possible models in this case 8 models. I am planning to extend the code later to include a large number of variables. I really hope you can help. Many thanks, A
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