Figure 9.9 depicts a market for electricity. S1 is the supply curve without the external costs. S2 is the supply curve with the $T tax. Assume electricity production incurs external costs. If the government imposes a pollution tax, the price of a mega-watt of electricity will increase by:

A. PA - PB.
B. PA - PC.
C. PB - PC.
D. 1/2 (PA - PC).

Answer: A

Economics

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