Hi, I'm fitting poisson regression models to counts of birds in 1x1 km squares using several environmental variables as predictors. I do this in a stepwise way, using the stepAIC function. However the resulting models appear to be overparametrized, since too much variables were included. I would like to know if there is the possibility of fitting models by steps but using the AICc instead of AIC. Or at least I wonder if it would be possible to save the AIC value and number of parameters of models fitted in each step and to calculate AICc afterward. Help on this will be very much appreciated German Lopez
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