The inverse supply function for coal is PS = 2 + QS. The inverse demand function for coal is PD = 20 - 2QD. By how much does consumer surplus increase when a $3 subsidy to consumption is introduced? (Assume that no tax was in place before the subsidy is introduced).

Microeconomics A Contemporary Intro
10th Edition
ISBN:9781285635101
Author:MCEACHERN
Publisher:MCEACHERN
Chapter5: Elasticity Of Demand And Supply
Section5.A: Appendix: Price Elasticity And Tax Incidence
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The inverse supply function for coal is PS = 2 + QS. The inverse demand function for coal is PD = 20 - 2QD. By how much does consumer surplus increase when a $3 subsidy to consumption is introduced? (Assume that no tax was in place before the subsidy is introduced).
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