Current dairy industry policy facilitates discriminatory pricing of milk used for market milk, domestic manufactured products and for export products. A variant of the Parish model is used to estimate transfer and efficiency costs of these arrangements. Transfers from consumers to producers represent about a third of gross farm returns. Efficiency costs of too little consumption are small. Estimated costs of excess production are between $25 million and $65 million a year. The model suggests important changes to the way in which the Industry Commission calculates rates of assistance to the dairy industry.