The U.S. government has subsidized ethanol production since 1978. With the advent of affordable electric cars, policymakers are considering whether to allow the subsidy to expire. The accompanying graph represents the market for ethanol. Move the supply and/or demand curves to show how reducing the subsidy will affect the ethanol market.
The Correct Answer and Explanation is:
To show how reducing the ethanol subsidy will affect the ethanol market, we must examine the effects on supply and demand.
Correct Graph Adjustment:
Explanation (300+ Words):
Government subsidies on ethanol reduce production costs for suppliers. When the U.S. government subsidizes ethanol, it essentially gives money to producers for every unit they produce or sell. This encourages production by making it cheaper to produce ethanol, thus shifting the supply curve to the right (or keeping it further right than it would otherwise be). The increased supply leads to a lower market price and higher equilibrium quantity than would occur without the subsidy.
If policymakers decide to allow the subsidy to expire, it means producers no longer receive financial support. This makes production more expensive, especially for smaller or less efficient firms. As a result, some producers may exit the market, and others may reduce output. This leads to a leftward shift of the supply curve—from S1 to S2. A leftward shift in the supply curve represents a decrease in supply, meaning that at every price level, producers are now willing to supply less ethanol than before.
The demand curve remains unchanged because consumer preference for ethanol is not directly affected by the presence or absence of a production subsidy. However, the market equilibrium does change.
As the supply curve shifts left, the new equilibrium price increases, and the equilibrium quantity decreases. This means that ethanol becomes more expensive for consumers, and less ethanol is bought and sold in the market.
This change could further reduce ethanol’s competitiveness relative to electric vehicles and gasoline, especially if electric cars become more affordable and charging infrastructure continues to expand.
Summary:
- Supply shifts leftward (S1 to S2)
- Price rises
- Quantity falls
This shift accurately reflects the economic impact of removing a production subsidy from a competitive market.