elasticity of supply

Overview of Supply-Side Concepts

  • Discussion of elasticity in the context of supply

  • Connection to previous learning

  • Announcement of review questions and assignments

Elasticity of Supply

  • Definition: Price elasticity of supply measures the responsiveness of quantity supplied to changes in price.

    • Similar to price elasticity of demand but focuses on sellers' responsiveness.

  • Key formula:

    • E_s = rac{ ext{Percentage Change in Quantity Supplied}}{ ext{Percentage Change in Price}}

    • Normalizing the percentage changes (typically to 1%).

Example of Elasticity of Supply Calculation

  • Scenario: Price of donuts increases by 12%, quantity supplied increases by 16%.

    • Calculation:

    • E_s = rac{16 ext{ ext{%}}}{12 ext{ ext{%}}} = 1.33

    • Interpretation: Positive value illustrates the law of supply — as price increases, quantity supplied increases.

Characteristics of Elasticity of Supply

  • Elastic Supply:

    • Elasticity greater than 1: sellers respond significantly to price changes.

    • Example: If price increases by 20%, quantity supplied increases by 35%.

    • Implication: Higher percentage change in quantity than price.

  • Inelastic Supply:

    • Elasticity less than 1: sellers are less responsive to price changes.

    • Example: If price increases by 1%, but quantity supplied increases less than 1%.

Graphical Representation of Elasticity

  • Horizontal Supply Curve: Indicates infinite elasticity. Small price changes lead to large changes in quantity supplied.

  • Vertical Supply Curve: Indicates perfectly inelastic supply. Quantity supplied does not change regardless of price changes.

  • Intermediate slopes between horizontal and vertical indicate varying degrees of elasticity.

Factors Influencing Elasticity of Supply

  1. Inventories:

    • Products that are easily stored are likely to have more elastic supply (e.g., gasoline).

    • Perishable goods (e.g., baked goods) have less elastic supply.

  2. Availability of Inputs:

    • Readily available inputs increase elasticity (e.g., landscaping business can hire more workers and buy supplies easily).

    • Difficult-to-obtain inputs lead to inelasticity (e.g., car manufacturing needing specialized chips).

  3. Market Entry and Exit Barriers:

    • Markets with low barriers to entry have more elastic supply (e.g., catering services).

    • High barriers to entry (e.g., airlines) lead to inelastic supply due to the industry's complexity and high startup costs.

  4. Time Factor:

    • Generally, supply becomes more elastic over time as producers adjust to price changes.

    • In the short term, supply is often inelastic as adjustments are difficult.

Practical Implications

  • Understanding these concepts helps analyze market behaviors and predict responses in various economic contexts and industries.

  • Elasticity reflects the nature of goods and market structures, influencing pricing strategies and business decisions.

Review of Assignments

  • Reminder that assignments for chapter 5 and learning curve assignments for chapter 6 are due by Sunday.

    • Part two of chapter 5 due this Sunday.

Conclusion

  • Upcoming video to illustrate applications of elasticity of supply in market analysis.

  • All discussed concepts hold broad relevance in economic analysis and real-world applications.