Question

What are the drawbacks of a linear model?

Answer 1

There are a couple of drawbacks of a linear model:

1. A linear model holds some strong assumptions that may not be true in application. It assumes a linear relationship, multivariate normality, no or little multicollinearity, no auto-correlation, and homoscedasticity
2. A linear model can’t be used for discrete or binary outcomes.
3. You can’t vary the model flexibility of a linear model.