Model Perspective
Aug 1, 2022 · Fundamentals
When to Use Poisson vs. Negative Binomial Regression: A Practical Guide
Poisson regression models count data assuming equal mean and variance, while negative binomial regression handles over‑dispersion by adding a gamma‑distributed heterogeneity term; this article explains their assumptions, likelihoods, interpretation of incidence rate ratios, and guidance on choosing the appropriate model with robust standard errors.
MLEPoisson regressioncount data
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