indicate whether you think the statement is true or false and explain why.  9. Natural gas and coal are two fuels used for electricity generation and their cross-price elasticity is positive.

Principles of Microeconomics
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ISBN:9781305156050
Author:N. Gregory Mankiw
Publisher:N. Gregory Mankiw
Chapter6: Supply, Demand And Government Policies
Section: Chapter Questions
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indicate whether you think the statement is true or false and
explain why. 

9. Natural gas and coal are two fuels used for electricity generation and their cross-price

elasticity is positive.
10. A tax on gasoline will have a smaller deadweight loss if the demand for gas is inelastic
than if it is elastic.
11. If the solar panel industry is competitive, the marginal firm makes zero profits in the long
run.
12. The supply of goods depends on the vertical aggregation of individual demands.
13. Applying dynamic efficiency to non-depletable renewable energy is not necessary because
its quantity will not in the future.
14. Given a competitive oil market and zero extraction cost, dynamic efficiency entails that the
current oil price equals the present discounted value of the future price.

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