Cross elasticity of demand

Definition: Cross-price elasticity of demand measures the responsiveness of the quantity demanded of one good to a change in the price of another related good.
Importance: Useful in analyzing relationships between substitute and complementary goods.
Formula:
- Cross-Price Elasticity of Demand (A to B) = (% Change in Quantity Demanded of A) / (% Change in Price of B)

Nature of Substitutes: Substitutes have a positive cross price elasticity of demand.
Impact of Price Change: An increase in the price of one product leads to a rise in demand for its substitute.
- Example: A 10% rise in price of good X may lead to an 8% increase in demand for its substitute, resulting in a XED coefficient of (+) 0.8.
Coefficient Interpretation: A higher coefficient value indicates a closer substitute relationship. Consumers are more likely to switch between competing products when relative prices change.

Threat to Oil Companies: The rise of electric cars presents a negative cross elasticity threat to oil companies, indicating a shift in consumer preferences.

Graphical Representation: Visuals depict the relationship between price of T and quantity demanded of V under various conditions:
- Strong substitute relationship shown by behavior of P1, Q1 and P2, Q2.
Key Takeaway: Positive cross price elasticity indicates strong substitutes, where increased demand for one results from increased price of another.

Characteristics of Complements: If cross-price elasticity is negative, two goods are considered complements.
Impact of Price Change: An increase in the price of good B results in a decrease in demand for good A.
- Example: A 20% rise in smartphone prices may result in a 10% reduction in demand for smartphone cases, yielding a cross-price elasticity of (-) 0.5.

Graphical Representation: Visuals illustrate the relationship between price of X and quantity demanded of Y, emphasizing strong and weak complementary relationships.
Key Points: Negative cross price elasticity indicates that when the price of one good increases, the demand for its complement decreases.

Question Examples:
- Likely XED of books and e-readers (0, -0.6, +0.9, -1.4)?
- Inferred statements from the relationship between price of Apple iPads and demand for Kindle Fire.
- Measure of cross-elasticity of demand for good X in relation to good Y (multiple-choice format).

Scenario: A 10% increase in city car parking charges resulted in bus journey demand rising from 800 to 1000.
Cross Elasticity Calculation: Resulting demand and charges provide necessary data for calculation options (+2.0, +2.5, etc.).

Examples of Applications:
- Product Bundling: Supermarket meal deals, bundled software with hardware, etc. Effective with negative cross-price elasticity indicating strong complementary relationships.
- Interdependent Pricing: Understanding XED helps businesses determine the impact of price changes on substitution effects, allowing them to make informed pricing strategies to increase total revenue and profit.