|Month||Class III||Class IV||Mailbox|
The Mailbox Price was regressed on the Class III and Class IV price from 2001-01-01 to 2017-06-01. Then, the Mailbox price is predicted using the formula:
where Q1, Q2 and Q3 are 0 or 1 according as whether the price pertains to quarters 1, 2 or 3. For the Class III and Class IV prices, we use the Announced Class III Price and Announced Class IV Price until Sep 2017, and the Class III Futures Settle Price and Class IV Futures Settle Price henceforth.
|Intercept||Class III||Class IV||Q1||Q2||Q3|