Final answer:
Trade discounts are true to be used to avoid frequent changes in catalogs and to adjust prices based on purchase quantities. The statement regarding selling goods for less than the equilibrium price is false as sellers might do so for strategic reasons.
Step-by-step explanation:
Trade discounts are indeed used to avoid frequent changes in catalogs and to alter prices for different quantities purchased. Therefore, the statement is True. Trade discounts allow businesses to offer price reductions based on the quantity purchased without having to frequently update their catalogs or price lists, which would be costly and time-consuming.
These discounts serve as an incentive for larger orders and help maintain consistent pricing strategies while allowing for flexibility when selling to different customers or in varying quantities. The statement that "In the goods market, no seller would be willing to sell for less than the equilibrium price" is false.
Sellers may choose to sell goods at a price lower than the equilibrium price for various reasons, such as clearing out excess inventory, responding to competition, or because the equilibrium price has recently shifted and they have not yet adjusted their prices. While it might not be ideal for sellers to trade below the equilibrium price, market dynamics and strategic decisions can lead to such scenarios.