Efficiency and equity

3 important questions on Efficiency and equity

What is the definition of consumer surplus?

excess of the benefit received from a good over the amount paid for it.
calculated by: (price willing to pay - actual price x quantity)/2

What determines a market failure?

a situation in which delivers an inefficient outcome, namely; under- or overproduction

What is a deadweight loss?

the decrease in the total surplus when there is an inefficient outcome. Also called social loss. 

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