You are expected to evaluate/examine (AO3) the forms of government intervention's consequences for markets and stakeholders (SL+HL)
Positive consequences of any government intervention includes:
It usually promotes general economic wellbeing
It can maximize social welfare (as it reduces negative externalities and promotes positive ones)
However, government intervention is not always successful, leading to not market failure but government failure.
Below are the consequences of the main ways the government can intervene in markets. You are expected to know both the consequences for the markets as well as for the stakeholders.
Blue = Intended effect (why the government intervened in the first place)
Green = 'Good' consequences
Red = 'Bad' consequences
Impact on markets:
Price: Will be lower than in a free market
Quantity: A shortage (supply) will arise
Impact on stakeholders:
Consumer surplus: Increases
Producer surplus: Decreases
Government: May have to supply the product itself to decrease the shortage
Impact on markets:
Price: Will be higher than in a free market
Quantity: A surplus (supply) will arise
Impact on stakeholders:
Consumer surplus: Decreases
Producer surplus: Increases
Government: May have to buy the product to decrease the surplus
Impact on markets:
Price: Will be higher than in a free market
Quantity: Quantity demanded will decrease
Impact on stakeholders:
Consumer surplus: Decreases
Producer surplus: Decreases
Government: Increases its tax revenue
Impact on markets:
Price: Will be lower than in a free market
Quantity: Quantity demanded will increase
Impact on stakeholders:
Consumer surplus: Increases
Producer surplus: Increases
Government: Has to spend more to finance the subsidy