Well let's assume deducted expectations model  is a reasonable model of expectations formation  right  call that equation number one  right, so our adaptive expectations model is  E T minus one, so that's E T  right, minus E  T minus two  into P T minus one  right, so that equals  gamma  into  P T minus one, minus E T minus two  P T minus one  right so that's the same expression as we had before, right that's the our ad our adapted expectations  model, that's, that's how we're assuming that expectations are generated  right, or revised  right  so, we're incorporating expectations into this model but we also want to incorporate the fact that farmers take some time to respond  to changes in price  alright.