Market Shortages and Government Interventions

  • Introduction to Market Shortages

    • Shortages can occur when prices do not reflect the equilibrium supply and demand.

    • Importance of understanding how goods are allocated among different consumers.

  • Understanding Price Control

    • Price controls can be ceilings or floors.

    • A price ceiling prevents prices from rising above a certain level, while a price floor prevents prices from falling below a certain level.

  • Demand and Supply Model Explanation

    • Regular supply and demand model indicates the equilibrium price ($P0$) and quantity ($Q0$).

    • Example: Set price at $10, demand curve shows consumers willing to purchase at or above this price, leading to equilibrium.

  • Introducing a Binding Price Ceiling

    • If a binding price ceiling is introduced (e.g., $5), it restricts the maximum allowable price.

    • Results in a lower quantity supplied ($Q_C$), creating a shortage since demand remains high at that price.

    • Rationing may occur: buyers may be selected based on first-come-first-serve, potentially leading to inefficiencies.

  • Consequences of Price Control

    • Shortages lead to additional search costs for buyers, as competition for the limited goods increases.

    • Real-world example: Gasoline shortages during the OPEC crisis; US had price ceilings but Canada did not, leading to long lines for gas in the US.

  • Effects of Rent Control

    • Similar effects as price ceilings; reduced number of rental units available.

    • Long run adjustments lead to even less supply as landlords exit the market or reduce maintenance of properties due to lower potential profits.

  • Understanding Binding Price Floors

    • Price floors, like minimum wage, create excess supply (more people willing to work than jobs available), leading to unemployment.

    • Market equilibrium not achieved; leads to a surplus of labor.

  • Tax Incidence

    • Tax can be imposed on either buyers or sellers, but the ultimate burden depends on the elasticity of supply and demand.

    • Example of tax incidence: Tax of $0.50 on ice cream shifts demand curve down for buyers, showing buyers now pay more than before.

    • Results in higher prices for buyers while sellers receive lower prices than before.

    • Determining tax incidence mathematically involves comparing old prices with new prices considering tax amount.

  • Rationing and Quotas

    • Government mandates can set minimum or maximum limits on quantities available in markets; this controls the flow of goods.

    • Example of mandates: car insurance is mandated to protect third parties.

    • Example of quotas: Restrictions on cannabis purchasing.

  • Conclusion and Economic Balance

    • Price controls often lead to unintended consequences: shortages, additional costs for buyers, and market inefficiencies.

    • Understanding these concepts is crucial for analyzing economic policies and their impacts on markets.