To determine what \( Q2 - Q1 \) represents in the context of price controls, let's clarify the terms involved:
- Quantity Demanded (Q1): The amount of a product consumers are willing to buy at the controlled price \( Pc \).
- Quantity Supplied (Q2): The amount of the product that producers are willing to sell at the controlled price \( Pc \).
Now let's analyze the scenarios involving price floors and price ceilings:
-
Price Floor: This is a minimum price set above the equilibrium price. It leads to a surplus because the quantity supplied exceeds the quantity demanded at that price.
-
Price Ceiling: This is a maximum price set below the equilibrium price. It leads to a shortage because the quantity demanded exceeds the quantity supplied at that price.
Given that \( Q2 \) (quantity supplied) is greater than \( Q1 \) (quantity demanded), \( Q2 - Q1 \) represents the difference between what producers want to sell and what consumers want to buy. Since this situation arises when there is a price control that creates a discrepancy between supply and demand, it would be indicative of a surplus.
Therefore, if \( Pc \) is set in such a way that \( Q2 > Q1 \), we can conclude that \( Q2 - Q1 \) represents the surplus resulting from the price control.
The most appropriate response is: "the surplus resulting from the price floor \( Pc \)".