The article explores different ways to change how companies are taxed in Australia, focusing on an allowance for corporate equity (ACE) tax. The researchers looked at how these changes could affect things like market outcomes, government revenue, fairness, and simplicity. They considered different options for calculating the tax, how much companies could deduct, the tax rate, and how losses are handled. They also looked at other possible changes to how capital income is taxed for residents and non-residents. Overall, they found that there isn't one best option, but there are several good ways to design a new tax system for companies in Australia.