To determine which price control resulted in a shortage of 300,000 apartments, we need to analyze the supply and demand at the given prices in the table.
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At a price of $1,000:
- Quantity Demanded: 600,000
- Quantity Supplied: 300,000
- Shortage = 600,000 - 300,000 = 300,000
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At a price of $1,500:
- Quantity Demanded: 500,000
- Quantity Supplied: 500,000
- No shortage or surplus.
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At a price of $2,000:
- Quantity Demanded: 400,000
- Quantity Supplied: 700,000
- Surplus = 700,000 - 400,000 = 300,000
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At a price of $2,500:
- Quantity Demanded: 300,000
- Quantity Supplied: 900,000
- Surplus = 900,000 - 300,000 = 600,000
A shortage occurs when the quantity demanded exceeds the quantity supplied. Since a shortage of 300,000 apartments occurs specifically at a price of $1,000, this indicates that the government price control must be a price ceiling set at $1,000.
Therefore, the correct response is:
a price ceiling of $1,000