Which of the following is NOT a type of child support calculation model?

The equitable distribution model is primarily used to divide marital property and assets during a divorce, rather than specifically addressing child support calculations. In contrast, the other models mentioned—income shares model, percentage of income model, and Melson Formula—are all established methods used to determine the appropriate amount of child support based on parental income and the needs of the child.

The income shares model calculates child support based on the income of both parents and how much they would have spent on the child if they were still living together, while the percentage of income model typically sets child support as a percentage of the non-custodial parent's income. The Melson Formula is a more complex method that takes into account both parents' incomes and the needs of the child, ensuring that the custodial parent also has adequate resources.

In summary, the equitable distribution model does not pertain to child support calculations and is instead focused on the fair division of marital assets, making it the correct choice as the one that is not a child support calculation method.