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Macroeconomics: Economic Efficiency, Government Price Setting, and Taxes

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  • What is consumer surplus?

    Consumer surplus is the difference between the highest price a consumer is willing to pay for a good or service and the actual price the consumer pays.

  • What is producer surplus?

    Producer surplus is the difference between the lowest price a firm would accept for a good or service and the price it actually receives.

  • How is consumer surplus represented graphically?

    Consumer surplus is the area below the demand curve and above the price that consumers pay.

  • How is producer surplus represented graphically?

    Producer surplus is the area above the supply curve and below the market price.

  • What determines the lowest price a firm would accept for a good?

    The marginal cost of producing that good or service determines the lowest price a firm would accept.

  • Define economic efficiency in a market.

    Economic efficiency occurs when the marginal benefit to consumers of the last unit produced equals its marginal cost of production, maximizing the sum of consumer and producer surplus.

  • What happens when a market is not in competitive equilibrium?

    There is a deadweight loss, which is a reduction in economic surplus and represents inefficiency in the market.

  • What is a price ceiling?

    A price ceiling is a legally determined maximum price that sellers may charge for a good or service.

  • What is a price floor?

    A price floor is a legally determined minimum price that sellers may receive for a good or service.

  • Give examples of price floors and ceilings in the U.S.

    Examples include minimum wages (price floor), rent controls (price ceiling), and agricultural price supports (price floor).

  • What is the economic effect of a price floor above equilibrium?

    It causes a surplus (excess supply), reduces quantity traded, transfers surplus from consumers to producers, and creates deadweight loss.

  • What is the economic effect of a price ceiling below equilibrium?

    It causes a shortage (excess demand), reduces quantity traded, transfers surplus from producers to consumers, and creates deadweight loss.

  • What is tax incidence?

    Tax incidence is the actual division of the burden of a tax between buyers and sellers in a market, regardless of who legally pays the tax.

  • What determines the tax incidence in a market?

    The relative slopes of the demand and supply curves determine tax incidence; steeper curves bear more of the tax burden.

  • How does a per-unit tax affect the supply curve?

    A per-unit tax shifts the supply curve upward by the amount of the tax, increasing the price paid by consumers and decreasing the price received by producers.

  • What is deadweight loss from a tax?

    Deadweight loss is the reduction in economic surplus caused by the tax, representing inefficiency due to decreased quantity traded.

  • What is the excess burden of a tax?

    The excess burden is the deadweight loss from a tax, reflecting the inefficiency relative to the tax revenue raised.

  • How can economists estimate consumer surplus from a service like Uber?

    By estimating the demand curve and knowing the price, economists calculate the area below the demand curve and above the price to find consumer surplus.

  • What is the marginal cost?

    Marginal cost is the change in a firm's total cost from producing one more unit of a good or service.

  • What is the significance of the competitive equilibrium quantity?

    At competitive equilibrium, marginal benefit equals marginal cost, maximizing economic surplus and ensuring economic efficiency.