Similarly as with the inventory bend, by its very nature the idea of an interest bend expects that the buyer be an ideal contender that will be, that the buyer have no impact over the market cost, This is valid in light of the fact that each point on the interest bend addresses the inquiry, "Assuming purchasers are confronted with this likely cost, the amount of the item will they buy?" But, on the off chance that a purchaser has market power {that is, the sum he purchases impacts the value), he isn't \"confronted with" some random cost, and we should utilize a more confounded model, of monopsony