Federico Gherardini wrote:
I'm trying to fit a glm model using family=poisson(link = "identity"). The problem is that the glm function fits a model with a negative intercept, which sounds like a nonsense to me, being the response a Poisson variable.
Not really. The negative intercept is on the scale of the linear predictor. The expected response, which is the exponential of the linear predictor, is always positive.
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