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2003 Mar 12
2
quasipoisson, glm.nb and AIC values
...Binomial(1.2356) family taken to be 1) Null deviance: 33.173 on 19 degrees of freedom Residual deviance: 22.316 on 16 degrees of freedom AIC: -15948 Number of Fisher Scoring iterations: 1 Correlation of Coefficients: (Intercept) mgmtcat1 mgmtcat2 mgmtcat1 -0.7052 mgmtcat2 -0.7053 0.4974 mgmtcat3 -0.7005 0.4940 0.494 Theta: 1.236 Std. Err.: 0.362 2 x log-likelihood: -211.079 And now, I am getting a negative AIC value! I have seen that this proble...