### Expected Cost for Franchise Deductible Formulas

This theory post will cover how to derive the Expected Cost Per Loss and the Expected Cost Per Payment using a franchise deductible.

### Stats Review 1: A Proof of the MSE formula

A theoretical derivation of $MSE_{\theta}(\hat{\theta}) = Var_\theta(\hat{\theta}) + Bias_\theta(\hat{\theta})^2$. This is background material and is only for those that are interested!