A few guidelines models have been introduced but not implemented by any state. They include:
1. Cost Shares (Children’s Right Council) – Described on page 8 of article located at http://guidelineeconomics.com/files/MT_PrimerForCSReviewPanel.pdf
2. ALI Model (American Law Institute) – Described as Marginal Expenditure Formula on page 7 of document located at http://guidelineeconomics.com/files/MT_PrimerForCSReviewPanel.pdf
3. Child Outcome-Based Support Model (COBS) – from Arizona
4. Income Equalization – Described on page 7 of article located at http://guidelineeconomics.com/files/MT_PrimerForCSReviewPanel.pdf