Government Intervention and Government Failure: Taxes, Subsidies, Regulation, Tradable Permits, Price Controls, Cost-Benefit Analysis

1. A government imposes an indirect tax equal to the marginal external cost of production. What is the intended effect?

A shift MPC towards MSC and reduce output to the social optimum
B shift MSC below MPC and increase output
C shift MPB towards MSB and increase demand
D remove all producer surplus

2. A per-unit tax is imposed on a good with price-inelastic demand. Who is likely to bear most of the tax burden?

A consumers
B producers
C government
D foreign firms only

3. A per-unit tax is imposed on a good with perfectly elastic demand. Who bears the tax burden?

A consumers only
B producers only
C consumers and producers equally
D no one because tax cannot be imposed

4. A per-unit tax is imposed on a good with perfectly inelastic demand. What happens to price and quantity?

A price rises by full tax; quantity unchanged
B price unchanged; quantity falls by full tax
C price rises by less than tax; quantity rises
D price falls; quantity unchanged

5. A tax on a demerit good is most effective at reducing consumption when demand is

A perfectly inelastic
B relatively inelastic
C relatively elastic
D unit elastic only

6. A tax on cigarettes may raise large revenue but reduce consumption only slightly because demand is likely to be

A price elastic
B price inelastic
C perfectly elastic
D income elastic

7. A subsidy on a good with positive externalities aims to

A increase consumption towards the socially efficient level
B reduce consumption below market equilibrium
C raise price and reduce output
D create a shortage

8. A subsidy paid to producers will usually

A shift supply right and reduce market price
B shift demand left and reduce quantity
C shift supply left and increase market price
D leave both price and quantity unchanged

9. If a subsidy is given to producers and demand is price-inelastic, the main benefit is likely to go to

A consumers through a larger price fall
B producers through a larger increase in producer revenue/net price
C government through higher tax revenue
D nobody because subsidies cannot affect price

10. If a subsidy is given to producers and supply is perfectly elastic, what is the likely effect?

A price falls by the full subsidy
B price rises by the full subsidy
C quantity remains zero
D producers receive all the benefit through higher price

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

11. A government imposes a maximum price below equilibrium. What is the likely result?

A surplus
B shortage
C equilibrium unchanged
D supply exceeds demand

12. A government imposes a minimum price above equilibrium. What is the likely result?

A shortage
B surplus
C demand equals supply exactly
D black market disappears automatically

13. Rent controls are an example of

A maximum price
B minimum price
C indirect tax
D tradable permit

14. A minimum wage set above equilibrium is likely to cause

A excess demand for labour
B excess supply of labour
C no unemployment
D lower labour supply

15. A maximum price is ineffective if it is set

A below equilibrium price
B above equilibrium price
C equal to zero
D below average cost always

16. A minimum price is ineffective if it is set

A above equilibrium price
B below equilibrium price
C above market clearing price
D above producer cost

17. A maximum price below equilibrium may reduce consumer welfare because

A some consumers cannot obtain the good due to shortage
B price rises above equilibrium
C supply becomes infinite
D demand falls to zero

18. A minimum price above equilibrium may increase producer income only if

A the percentage fall in quantity is smaller than the percentage rise in price
B demand is perfectly elastic
C government bans all purchases
D supply becomes zero

19. A buffer stock scheme aims to

A stabilise prices by buying surplus output and selling from stocks during shortages
B increase prices without storing goods
C eliminate all agricultural production
D ban exports permanently

20. A successful buffer stock scheme is most suitable for goods that are

A highly perishable and costly to store
B cheap to store and not quickly perishable
C services only
D public goods only

21. Tradable pollution permits work by

A setting a maximum total level of pollution and allowing firms to trade permits
B banning all firms from producing
C subsidising pollution
D setting price at zero

22. The main advantage of tradable pollution permits over uniform regulation is that

A pollution reduction may occur where it is cheapest
B every firm must reduce pollution by exactly the same amount
C firms cannot trade
D total emissions are unlimited

23. If the government reduces the number of pollution permits available, the permit price is likely to

A rise
B fall
C become zero
D become negative

24. A firm will buy pollution permits if

A the cost of buying permits is lower than reducing emissions itself
B the cost of reducing emissions is lower than buying permits
C permits are banned
D emissions are zero

25. A firm will sell pollution permits if

A it can reduce emissions at low cost and has spare permits
B it cannot reduce emissions cheaply
C the permit price is below zero
D it wants to increase emissions above legal limits

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

26. Regulation is most likely to correct market failure when

A rules can be monitored and enforced effectively
B monitoring is impossible
C firms face no penalties
D consumers have perfect information already

27. Which is an example of regulation?

A banning smoking in enclosed public spaces
B reducing interest rates
C lowering income tax
D allowing all pollution without limit

28. Which is a possible disadvantage of regulation?

A high enforcement and compliance costs
B lower compliance costs always
C automatic perfect information
D no risk of government failure

29. Which policy is most suitable where consumers underestimate the health damage of a product?

A information campaigns and labelling
B subsidy to producers
C maximum price below equilibrium
D removal of all age restrictions

30. Which policy is most suitable where a product creates a negative consumption externality and demand is elastic?

A indirect tax or regulation
B subsidy
C free provision
D maximum price below equilibrium

31. Cost-benefit analysis is used mainly to

A compare social costs and social benefits of a project
B compare only private profits of one firm
C calculate total revenue only
D measure inflation only

32. A project should be accepted using cost-benefit analysis if

A total social benefits exceed total social costs
B private costs exceed private benefits
C external costs exceed external benefits only
D consumer surplus equals zero

33. Which is most difficult in cost-benefit analysis?

A placing monetary values on external costs and benefits
B adding private costs paid in money
C identifying the market price of materials
D calculating wages paid to workers

34. Which is an external benefit in a new railway project?

A lower road congestion for non-users
B wages paid to railway workers
C cost of buying steel
D ticket revenue earned by the railway operator

35. Which is an external cost in a new airport project?

A noise pollution suffered by nearby residents
B landing fees paid by airlines
C salaries of airport staff
D profit earned by airport shops

36. Government failure occurs when

A intervention causes a net loss of economic welfare or worsens allocation
B markets always allocate resources perfectly
C externalities disappear naturally
D taxes never affect incentives

37. Which is an example of government failure?

A a subsidy leads to overproduction and waste
B a tax internalises external costs perfectly
C regulation removes all external costs at zero cost
D information campaigns improve decisions with no cost

38. A government subsidy may cause government failure if

A it supports inefficient firms and wastes resources
B it corrects underconsumption exactly
C it lowers price to the social optimum
D it increases external benefits without cost

39. A tax may cause government failure if

A it is set above the marginal external cost and output falls below the social optimum
B it exactly equals marginal external cost
C it removes deadweight welfare loss fully
D it improves allocative efficiency perfectly

40. A maximum price may cause government failure if

A it creates shortages, black markets and lower quality
B it makes quantity supplied exceed quantity demanded
C it removes excess demand
D it raises price above equilibrium

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

41. A minimum price may cause government failure if

A it creates surpluses requiring costly government purchases
B it creates a shortage
C it lowers producer revenue to zero always
D it causes price to fall below equilibrium

42. Why may government intervention suffer from information failure?

A government may not know the true size of external costs or benefits
B government has perfect information in all markets
C consumers always reveal true preferences costlessly
D firms never hide information

43. Which is a possible unintended consequence of banning smoking inside buildings?

A more litter and smoke outside entrances
B lower passive smoking inside buildings
C fewer cigarettes consumed by some smokers
D improved air quality indoors

44. Which is a possible conflict when taxing a demerit good?

A revenue may rise, but low-income consumers may be hit harder
B demand always becomes zero
C producer surplus always increases
D government spending must fall

45. Which tax is most likely to be regressive?

A indirect tax on essential goods
B progressive income tax
C corporation tax on profits
D inheritance tax on large estates

46. A government places a tax on petrol to reduce pollution. Which factor makes the tax less effective in reducing consumption?

A petrol demand is price-inelastic
B petrol demand is price-elastic
C many substitutes are available
D consumers can easily avoid using petrol

47. A subsidy on public transport may reduce pollution if

A it encourages people to switch from private cars to buses and trains
B it raises public transport prices
C it reduces public transport supply
D it increases car use

48. A maximum rent below equilibrium may help tenants who obtain housing but harm others because

A landlords may reduce supply or maintenance
B quantity supplied rises sharply
C housing becomes unlimited
D rent rises above equilibrium

49. Which chain is most accurate for an indirect tax on a negative production externality?

A external cost → tax raises private cost → output falls → market moves towards social optimum
B external benefit → tax lowers private cost → output rises → welfare falls
C external cost → subsidy raises output → social optimum reached
D external cost → maximum price increases supply → overproduction solved

50. Which chain is most accurate for government failure?

A inaccurate estimate of external cost → tax set too high → output falls below social optimum → welfare loss
B accurate estimate of external cost → tax equals MEC → welfare loss increases automatically
C underconsumption of merit good → subsidy exactly correct → government failure occurs
D public good → free-rider problem solved at zero cost → welfare loss rises automatically

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

1. Answer: A

A correct: a tax equal to the marginal external cost internalises the externality by raising MPC towards MSC and reducing output to the social optimum.
B wrong: a tax raises private cost; it does not shift MSC below MPC.
C wrong: shifting MPB towards MSB is more linked to subsidies/information for positive consumption externalities.
D wrong: producer surplus may fall, but it is not completely removed.

2. Answer: A

A correct: when demand is price-inelastic, consumers are less responsive to price rises, so firms can pass on most of the tax.
B wrong: producers bear more burden when demand is elastic or supply is inelastic.
C wrong: government receives tax revenue; it does not bear the burden in the market incidence sense.
D wrong: foreign firms only bear it if specific trade conditions apply; not generally.

3. Answer: B

A wrong: with perfectly elastic demand, consumers will not accept any price rise.
B correct: producers bear the tax because price cannot rise without quantity demanded falling to zero.
C wrong: equal sharing is not the perfectly elastic demand case.
D wrong: tax can be imposed, but incidence falls on producers.

4. Answer: A

A correct: with perfectly inelastic demand, quantity does not change and consumers bear the full tax through a full price rise.
B wrong: quantity does not fall when demand is perfectly inelastic.
C wrong: quantity does not rise after a tax.
D wrong: price rises, not falls.

5. Answer: C

A wrong: perfectly inelastic demand means quantity will not fall.
B wrong: relatively inelastic demand means consumption falls only slightly.
C correct: the more elastic demand is, the larger the fall in quantity after a tax.
D wrong: unit elastic is not necessarily the most effective.

6. Answer: B

A wrong: if demand were elastic, consumption would fall significantly.
B correct: cigarette demand is often price-inelastic due to addiction, so tax raises revenue but reduces consumption only slightly.
C wrong: perfectly elastic demand would make passing tax to consumers impossible.
D wrong: income elasticity is not the key issue.

7. Answer: A

A correct: a subsidy lowers price or cost, encouraging consumption/production of goods with external benefits.
B wrong: subsidy increases, not reduces, consumption.
C wrong: producer subsidy usually lowers price and raises output.
D wrong: subsidy normally reduces shortages by increasing supply.

8. Answer: A

A correct: a producer subsidy lowers production costs, shifting supply right and reducing market price.
B wrong: subsidy affects supply directly, not demand left.
C wrong: supply shifts right, not left.
D wrong: price and quantity usually change.

9. Answer: A

A correct: with inelastic demand, consumers are less responsive, so a producer subsidy tends to create a larger price fall for consumers.
B wrong: producers gain more when demand is elastic or supply is inelastic.
C wrong: subsidies cost government money; they do not directly raise tax revenue.
D wrong: subsidies can affect price.

10. Answer: A

A correct: with perfectly elastic supply, producers must receive the same net price, so the full subsidy is passed to consumers as a lower price.
B wrong: subsidy lowers price, not raises it.
C wrong: quantity may increase.
D wrong: producers do not keep the benefit through higher net price in this case.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

11. Answer: B

A wrong: surplus happens with a minimum price above equilibrium.
B correct: maximum price below equilibrium creates excess demand, so shortage.
C wrong: equilibrium changes because price cannot rise to clear the market.
D wrong: at a shortage, quantity demanded exceeds quantity supplied.

12. Answer: B

A wrong: shortage happens with maximum price below equilibrium.
B correct: minimum price above equilibrium creates excess supply, so surplus.
C wrong: the market does not clear.
D wrong: black markets may appear rather than disappear.

13. Answer: A

A correct: rent control usually means a legal maximum rent below equilibrium.
B wrong: minimum price is a price floor.
C wrong: indirect tax raises price through taxation.
D wrong: tradable permits control pollution quantities.

14. Answer: B

A wrong: firms demand less labour while more workers want jobs.
B correct: a minimum wage above equilibrium creates excess supply of labour, meaning unemployment.
C wrong: unemployment may increase.
D wrong: labour supply usually rises at a higher wage.

15. Answer: B

A wrong: below equilibrium makes a maximum price binding.
B correct: above equilibrium, the market price is already lower, so the maximum has no effect.
C wrong: zero price is likely very effective and creates huge shortage.
D wrong: average cost does not determine whether the price ceiling binds.

16. Answer: B

A wrong: above equilibrium makes a minimum price binding.
B correct: below equilibrium, the market price is already higher, so the minimum has no effect.
C wrong: above market clearing price is binding.
D wrong: producer cost alone does not decide effectiveness.

17. Answer: A

A correct: although price is lower, shortage means some consumers cannot buy the good.
B wrong: legal price is below equilibrium.
C wrong: supply contracts, not becomes infinite.
D wrong: demand rises at the lower price.

18. Answer: A

A correct: producer income/revenue rises only if price rises proportionately more than quantity falls.
B wrong: perfectly elastic demand would cause a large fall in quantity and revenue may fall.
C wrong: banning purchases destroys demand.
D wrong: if supply is zero, producer income is zero.

19. Answer: A

A correct: buffer stock schemes buy excess supply in good harvests and sell stocks in shortages to stabilise prices.
B wrong: storing goods is central to buffer stocks.
C wrong: it does not eliminate production.
D wrong: it is not mainly an export ban.

20. Answer: B

A wrong: perishable and costly-to-store goods make buffer stocks expensive and wasteful.
B correct: goods should be storable and cheap to store.
C wrong: services cannot usually be stored.
D wrong: public goods are not normally buffer-stock goods.

21. Answer: A

A correct: tradable permits cap total emissions and allow firms to buy/sell rights to pollute.
B wrong: firms can still produce if they hold permits.
C wrong: permits restrict pollution; they do not subsidise it.
D wrong: permits create a market price, not zero price.

22. Answer: A

A correct: firms with low abatement costs reduce pollution and sell permits; firms with high abatement costs buy permits, reducing pollution cheaply overall.
B wrong: uniform regulation often requires same reductions from all firms.
C wrong: trading is the key feature.
D wrong: total emissions are capped.

23. Answer: A

A correct: fewer permits reduce supply of permits, so their price rises, other things equal.
B wrong: price would fall if permits became more abundant.
C wrong: scarcity makes permits valuable.
D wrong: permit prices do not become negative in normal markets.

24. Answer: A

A correct: if buying permits is cheaper than cutting emissions, the firm buys permits.
B wrong: if reducing emissions is cheaper, the firm reduces emissions and may sell permits.
C wrong: if permits are banned, they cannot be bought.
D wrong: a zero-emission firm does not need permits.

25. Answer: A

A correct: a firm with low abatement costs can reduce pollution cheaply and sell unused permits.
B wrong: if it cannot reduce emissions cheaply, it is more likely to buy permits.
C wrong: permit prices are not below zero normally.
D wrong: selling permits reduces its legal ability to emit.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

26. Answer: A

A correct: regulation works best when compliance can be monitored and penalties enforced.
B wrong: impossible monitoring causes failure.
C wrong: no penalties reduce compliance.
D wrong: if information is already perfect, regulation may be less necessary.

27. Answer: A

A correct: banning smoking in enclosed public spaces is a rule backed by law.
B wrong: reducing interest rates is monetary policy.
C wrong: lowering income tax is fiscal policy.
D wrong: allowing unlimited pollution is absence of regulation.

28. Answer: A

A correct: regulation may require inspection, paperwork, equipment changes and enforcement spending.
B wrong: compliance costs may rise.
C wrong: regulation does not automatically create perfect information.
D wrong: government failure remains possible.

29. Answer: A

A correct: information campaigns and labelling help consumers understand health risks.
B wrong: subsidies encourage consumption.
C wrong: maximum price makes the product cheaper, increasing consumption.
D wrong: removing age restrictions may increase harmful consumption.

30. Answer: A

A correct: if demand is elastic, tax or regulation can significantly reduce consumption.
B wrong: subsidy increases consumption.
C wrong: free provision increases consumption.
D wrong: maximum price below equilibrium lowers price and encourages consumption.

31. Answer: A

A correct: cost-benefit analysis compares social costs and social benefits, including external effects.
B wrong: it is broader than private profits.
C wrong: total revenue alone ignores costs and externalities.
D wrong: inflation measurement uses price indices.

32. Answer: A

A correct: a project is worthwhile if total social benefits exceed total social costs.
B wrong: private costs exceeding private benefits would discourage private investment, but CBA uses social totals.
C wrong: external costs alone are not enough; compare all social costs and benefits.
D wrong: consumer surplus does not need to be zero.

33. Answer: A

A correct: externalities such as noise, time savings, pollution and health effects are hard to value in money terms.
B wrong: private monetary costs are easier to add.
C wrong: market prices of materials are observable.
D wrong: wages are usually directly measurable.

34. Answer: A

A correct: reduced congestion benefits road users who are not directly paying railway operator revenue.
B wrong: wages are private/project costs.
C wrong: steel is a private cost.
D wrong: ticket revenue is a private benefit.

35. Answer: A

A correct: noise suffered by nearby residents is an external cost.
B wrong: landing fees are private revenue/cost within the market transaction.
C wrong: salaries are private costs.
D wrong: shop profits are private benefits.

36. Answer: A

A correct: government failure occurs when intervention worsens welfare or creates a net welfare loss.
B wrong: markets do not always allocate perfectly.
C wrong: externalities may persist.
D wrong: taxes often affect incentives.

37. Answer: A

A correct: a badly designed subsidy can encourage excess output and waste resources.
B wrong: perfectly internalising external costs is successful intervention.
C wrong: zero-cost perfect regulation would not be failure.
D wrong: costless improvement in information would not be failure.

38. Answer: A

A correct: subsidies can keep inefficient firms alive and misallocate resources.
B wrong: exact correction is not government failure.
C wrong: reaching social optimum is success.
D wrong: benefits without cost would not create failure.

39. Answer: A

A correct: overtaxing can reduce output too far below the social optimum, creating welfare loss.
B wrong: a tax equal to MEC corrects the externality.
C wrong: removing DWL fully is success.
D wrong: perfect improvement is not failure.

40. Answer: A

A correct: a binding maximum price can create shortages, rationing, lower quality and black markets.
B wrong: minimum price creates quantity supplied exceeding quantity demanded.
C wrong: maximum price creates excess demand.
D wrong: maximum price is below equilibrium if binding.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

41. Answer: A

A correct: a minimum price above equilibrium creates surplus, which may require expensive government buying/storage.
B wrong: maximum prices create shortages.
C wrong: producer revenue does not always fall to zero.
D wrong: minimum price raises legal price above equilibrium if binding.

42. Answer: A

A correct: governments may misjudge external costs/benefits, leading to taxes or subsidies that are too high or too low.
B wrong: governments do not have perfect information.
C wrong: preferences are hard to measure.
D wrong: firms may hide or distort information.

43. Answer: A

A correct: banning indoor smoking may push smokers outdoors, increasing litter and smoke near entrances.
B wrong: this is an intended benefit, not an unintended negative consequence.
C wrong: lower smoking may be intended.
D wrong: improved indoor air quality is intended.

44. Answer: A

A correct: demerit-good taxes can raise revenue but may be regressive if low-income consumers spend a higher share of income on the good.
B wrong: demand does not always become zero.
C wrong: producer surplus usually falls if quantity falls.
D wrong: tax revenue may allow spending to rise.

45. Answer: A

A correct: indirect taxes on essentials take a larger percentage of low-income households’ income.
B wrong: progressive income tax is designed to be progressive.
C wrong: corporation tax is on profits, not usually classed as regressive household tax.
D wrong: inheritance tax on large estates is usually progressive.

46. Answer: A

A correct: if petrol demand is price-inelastic, quantity demanded falls only slightly after tax.
B wrong: elastic demand makes the tax more effective at reducing consumption.
C wrong: substitutes make demand more elastic.
D wrong: easy avoidance makes demand more elastic.

47. Answer: A

A correct: cheaper public transport can shift people away from cars, reducing congestion and emissions.
B wrong: subsidy should reduce public transport prices.
C wrong: subsidy usually increases supply/use.
D wrong: the aim is to reduce car use.

48. Answer: A

A correct: low controlled rents can reduce landlords’ incentive to supply housing or maintain property.
B wrong: quantity supplied usually falls.
C wrong: housing remains scarce.
D wrong: legal rent is below equilibrium.

49. Answer: A

A correct: a tax raises private production cost, reduces output and moves the market towards the social optimum where external costs exist.
B wrong: tax does not lower private cost.
C wrong: subsidy would worsen overproduction from external costs.
D wrong: maximum price reduces supply but does not internalise production externality properly.

50. Answer: A

A correct: if government overestimates external cost, tax is too high, output falls too much and welfare loss occurs.
B wrong: accurate Pigouvian tax reduces welfare loss.
C wrong: exact correction is not government failure.
D wrong: public-good provision is not solved at zero cost in reality.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.