Government Intervention: Price Controls and Taxes

  • Context: Government's Role in Protecting People

    • The United States, despite its economic output, does not offer paid maternity leave, unlike many developed and even some former communist countries (which offered 1 year at 80\% pay, or 2 years if desired). Most of Europe offers 6 months to 2 years of paid leave.
    • This highlights a societal protection gap, suggesting the country "can do better" by protecting its people, even with high economic output.

  • Price Floors

    • Definition: A minimum legal price for a good or service.
    • Binding Price Floor: A price floor is considered binding if it is set above the equilibrium price. This means the market cannot reach its natural equilibrium.
    • Effect of a Binding Price Floor: It causes a surplus because at the higher mandated price, the quantity supplied will exceed the quantity demanded.
    • Application Example: Price floors are often used for agricultural products to help farmers.
    • Numerical Example: If the equilibrium price is $100 and a price floor is set at $120. This is binding because $120 > $100. It will result in quantity supplied (QS) being greater than quantity demanded (QD), creating a surplus.
    • Non-Binding Price Floor: If the equilibrium price is $100 and a price floor is set at $90, it is non-binding because the market can still reach equilibrium (100) above the floor (90). The market will remain at equilibrium.

  • Price Ceilings

    • Definition: A maximum legal price for a good or service.
    • Binding Price Ceiling: A price ceiling is considered binding if it is set below the equilibrium price. This means the market cannot reach its natural equilibrium price.
    • Effect of a Binding Price Ceiling: It causes a shortage because at the lower mandated price, the quantity demanded will exceed the quantity supplied.
    • Numerical Example: If the equilibrium price is $100 and a price ceiling is set at $90. This is binding because $90 < $100. The price will be capped at $90, leading to QD > QS, creating a shortage. The size of the shortage is the difference between QD and QS at the ceiling price (e.g., 30 units if QD = 80 and QS = 50).
    • Increasing a Binding Price Ceiling: If a binding price ceiling (e.g., 90) is increased (e.g., to 95), the shortage will decrease because the new ceiling is closer to the equilibrium price (100), moving QD and QS closer together.
    • Non-Binding Price Ceiling: If the equilibrium price is $100 and a price ceiling is set at $110, it is non-binding because the market can still reach equilibrium (100) below the ceiling (110). The market will remain at equilibrium.

  • Government Intervention (General Principle)

    • While free markets are generally efficient for organizing economic activity, direct government intervention through price controls (ceilings and floors) often leads to inefficiencies (surpluses or shortages).
    • However, government intervention can be desirable in specific cases, such as regulating monopolies, where market outcomes are not efficient, to improve societal welfare (e.g., telling Google not to engage in certain anti-competitive practices).

  • Taxes

    • Purpose of Taxes: Governments collect taxes to fund public services like buildings, street cleaning, social safety nets, salaries of public officials (e.g., Congress, senators), police, firefighters, and national defense.

    • Legal Incidence vs. Tax Burden:

      • Legal Incidence: Refers to the party (buyer or seller) on whom the tax is legally imposed by the government. For example, a tax on sellers (e.g., $1 for every pizza sold) or a tax on buyers (e.g., $1.50 for every airplane bought).
      • Tax Burden (or Economic Incidence): Refers to how the actual economic cost of the tax is ultimately distributed between buyers and sellers, regardless of legal incidence.
      • Key Principle: The legal incidence of a tax does not determine its economic burden. The burden is always split between buyers and sellers.

    • Impact of a Tax Imposed on Buyers (Demand-Side Tax):

      • Mechanism: Imposing a tax on buyers effectively decreases demand by a vertical distance equal to the tax amount. The demand curve shifts downward (or to the left) by the tax amount.
      • Example (Pizza): If pizza originally costs $10, and a $1.50 tax is imposed on buyers:
        • Buyers now effectively pay 10 + 1.50 = 11.50 for the pizza.
        • Consumers will demand less at every given price the seller receives. The only way for buyers to still buy the original quantity (500 pizzas) would be if the seller received only 8.50, so with the tax, the total cost returns to $10. This indicates a decrease in demand.
      • Results:
        • Quantity: The quantity bought and sold in the market decreases.
        • Prices: A "tax wedge" is created between the price paid by buyers and the price received by sellers.
          • Buyers pay a higher price than before the tax.
          • Sellers receive a lower price than before the tax.
        • Example (with tax wedge): If equilibrium was 10 and 500 units:
          • After a 1.50 tax on buyers, the new quantity might be 450 units.
          • Buyers might pay 11 (price on new demand curve at 450 units).
          • Sellers might receive 9.50 (price on supply curve at 450 units).
          • The difference (11 - 9.50 = 1.50) is the tax amount.
        • Consumer Burden: Buyers pay 1 more (11 - 10). (1 per pizza).
        • Producer Burden: Sellers receive 0.50 less (10 - 9.50). (0.50 per pizza).
        • Government Revenue: The government collects the tax amount per unit (1.50) multiplied by the new, lower quantity sold.

    • Impact of a Tax Imposed on Sellers (Supply-Side Tax):

      • If the tax were legally imposed on sellers, it would shift the supply curve upward (or to the left) by the tax amount. However, the final market outcome (new quantity, price paid by buyers, price received by sellers, and the distribution of the tax burden) would be exactly the same as if the tax were imposed on buyers.

    • Finding the Tax Wedge Graphically:

      • To find the effect of a specific tax amount (e.g., 30) on a graph, locate a vertical distance of that amount between the supply and demand curves. This point will indicate the new quantity traded.
      • The upper point on the demand curve at that quantity is the price paid by buyers (P_{\text{buyer}}).
      • The lower point on the supply curve at that quantity is the price received by sellers (P_{\text{seller}}).
      • The difference (P{\text{buyer}} - P{\text{seller}}) must equal the tax amount.
      • Example: If equilibrium is 100, and a 30 tax creates a wedge such that P{\text{buyer}} = 110 and P{\text{seller}} = 80 (110 - 80 = 30).

    • Calculating Tax Burden (Incidence) Graphically:

      • Buyer's Burden: P{\text{buyer}} - P{\text{equilibrium}}. (Example: 110 - 100 = 10).
      • Seller's Burden: P{\text{equilibrium}} - P{\text{seller}}. (Example: 100 - 80 = 20).

  • Elasticity and the Distribution of Tax Burden

    • Key Rule: The side of the market (buyers or sellers) that is more inelastic will bear a greater share of the tax burden.
    • Inelastic Demand (Steep Demand Curve): If demand is very inelastic, buyers have fewer alternatives and are less responsive to price changes. When a tax is imposed, buyers will bear a larger share of the burden (price paid by buyer increases significantly, price received by seller decreases slightly).
    • Inelastic Supply (Steep Supply Curve): If supply is very inelastic, sellers cannot easily adjust their production in response to price changes. When a tax is imposed, sellers will bear a larger share of the burden (price received by seller decreases significantly, price paid by buyer increases slightly).
    • Visualization: Drawing graphs with varying elasticity and applying the same tax wedge demonstrates this principle clearly.

  • Case Study: The 1990s Luxury Tax

    • Background: In the 1990s, Congress imposed a tax on luxury items (e.g., expensive cars, airplanes, yachts), with the legal incidence on buyers.
    • Economic Reality: The demand for luxury items is generally relatively elastic (buyers can easily postpone purchases or find alternatives), while the supply of luxury items is relatively inelastic (producers have specialized facilities and cannot easily switch production).
    • Outcome: Despite the tax being legally on buyers, the economic burden fell disproportionately on the producers/sellers (the inelastic side). This led to significant layoffs in the industries producing these luxury goods within three years.
    • Conclusion: Congress realized the negative economic impact on domestic industries and subsequently repealed the luxury tax.

  • Summary of Tax Effects:

    • A tax, regardless of whether it's imposed on buyers or sellers, will:
      • Decrease the quantity bought and sold in the market.
      • Create a wedge between the price buyers pay and the price sellers receive, equal to the tax amount.
      • Make buyers pay more and sellers receive less compared to the equilibrium prices.
      • Result in both buyers and sellers being worse off (less quantity, less favorable prices).
      • Shift the burden of the tax towards the more inelastic side of the market.

  • Other Concepts Mentioned (briefly revisited during application questions):

    • Removing a Binding Price Floor: If a binding price floor is removed, the market price will fall to the equilibrium level, and quantity will move to the equilibrium quantity.
    • Imposing a Binding Price Floor: Imposing a binding price floor will increase the market price and create a surplus.