Question 1

What happens to producer surplus when demand decreases?

Accepted Answer

When demand decreases, the demand curve shifts left, lowering equilibrium price and quantity. Producers sell fewer goods at a lower price, causing producer surplus to decrease. This reduction reflects both the lower selling price and reduced sales volume in the market.

Question 2

How does a leftward demand shift affect consumer surplus?

Accepted Answer

A leftward demand shift creates mixed effects on consumer surplus. Part of the initial consumer surplus disappears due to lower quantity sold. However, the price reduction transfers some producer surplus to consumers, partially offsetting the loss. The net effect on consumer surplus remains indeterminate.

Question 3

What is the relationship between demand changes and market equilibrium?

Accepted Answer

Changes in demand directly affect market equilibrium by shifting the demand curve, which adjusts both equilibrium price and quantity. These adjustments redistribute consumer and producer surplus based on how price and quantity are modified, altering the overall market outcome and efficiency.

Question 4

Why does consumer surplus experience mixed effects when demand rises?

Accepted Answer

When demand increases, the demand curve shifts right, raising equilibrium price and quantity. Although some initial consumer surplus is lost due to the higher price, an additional area is included in the new consumer surplus from increased quantity sold. These offsetting effects make the net impact indeterminate.

Question 5

How does a demand increase benefit producers?

Accepted Answer

An increase in demand shifts the demand curve rightward, raising both equilibrium price and quantity sold. Producers benefit as their surplus expands with the higher price and increased sales volume. This expansion represents greater total profit from selling more units at higher prices.

Question 6

What determines consumer and producer surplus in a competitive market?

Accepted Answer

In a competitive market, equilibrium price and quantity determined by supply and demand forces establish surplus levels. Consumers benefit by paying less than their maximum willingness to pay, while producers benefit by selling above their marginal cost. These benefits represent consumer and producer surplus respectively.

Question 7

Why is the net effect on consumer surplus indeterminate after demand changes?

Accepted Answer

Demand shifts create opposing forces on consumer surplus. When demand decreases, lower quantity reduces surplus while lower prices increase it. When demand increases, higher prices reduce surplus while greater quantity increases it. These competing effects make the overall net change indeterminate without specific numerical values.

Déplacement de la courbe de demande

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