A Commentary on Distribution-Channels Modeling -- The Bilateral-Monopoly Model and Channel Myths -- Multiple (Exclusive) Retailers -- Multiple (Exclusive) States-of-Nature -- Toward a Manufacturer-Optimal Per-Unit Fee: A Channel-Coordinating Quantity-Discount Schedule -- The Manufacturer-Optimal Two-Part Tariff -- The Channel-Coordinating Menu -- Coordination versus Maximization: Theoretical An…