Final Decision - Review of imputation credits - gamma - March 2012

Imputation tax credits (gamma) is a component of tax liability and notional revenue in a post-tax building block model. This report explains our final decision for IPART’s future price determinations, taking into account recent changes in regulatory practice, empirical studies and gamma values used in
commercial valuations. Our final decision for the value gamma in a post-tax building block model is 0.25.