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Cross-Validation Versus Regularization

Nina Zumel takes us through a pair of techniques for avoiding overfitting:

Cross-validation is relatively computationally expensive; regularization is relatively cheap. Can you mitigate nested model bias by using regularization techniques instead of cross-validation?

The short answer: no, you shouldn’t. But as, we’ve written before, demonstrating this is more memorable than simply saying “Don’t do that.”

Definitely worth the read.