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What is the characteristic of perfectly elastic demand?
What is the characteristic of perfectly elastic demand?
In which situation does unit elasticity occur?
In which situation does unit elasticity occur?
Which factor increases the price elasticity of demand for a commodity?
Which factor increases the price elasticity of demand for a commodity?
Why is the demand for luxury goods likely to be more elastic?
Why is the demand for luxury goods likely to be more elastic?
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How does expenditure on a commodity relate to its price elasticity?
How does expenditure on a commodity relate to its price elasticity?
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What is an example of a commodity with low price elasticity of demand?
What is an example of a commodity with low price elasticity of demand?
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In what time frame is demand usually more inelastic?
In what time frame is demand usually more inelastic?
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Which of the following is a determinant of price elasticity of demand?
Which of the following is a determinant of price elasticity of demand?
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What happens to total revenue when the price of a product is reduced and the demand is price elastic?
What happens to total revenue when the price of a product is reduced and the demand is price elastic?
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If a product has inelastic demand, what effect does a price increase have on the total amount spent by consumers?
If a product has inelastic demand, what effect does a price increase have on the total amount spent by consumers?
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What is the elasticity of demand when quantity demanded does not change regardless of price changes?
What is the elasticity of demand when quantity demanded does not change regardless of price changes?
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As you move from point A to point E on a demand curve, how does elasticity behave?
As you move from point A to point E on a demand curve, how does elasticity behave?
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What occurs when the demand for a product is of unitary elasticity?
What occurs when the demand for a product is of unitary elasticity?
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What can be inferred about total revenue when demand is price elastic?
What can be inferred about total revenue when demand is price elastic?
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What does the elasticity coefficient indicate when it exceeds one?
What does the elasticity coefficient indicate when it exceeds one?
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What can be said about the quantity demanded and price reductions when demand is price elastic?
What can be said about the quantity demanded and price reductions when demand is price elastic?
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What happens to total spending on goods when moving from point E to I under unitary elasticity?
What happens to total spending on goods when moving from point E to I under unitary elasticity?
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What does elasticity of supply measure?
What does elasticity of supply measure?
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What is a characteristic of supply in the momentary period?
What is a characteristic of supply in the momentary period?
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How can supply be increased in the short run?
How can supply be increased in the short run?
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If the price elasticity of demand for fresh fish is perfectly inelastic, how does the quantity demanded respond to a price change?
If the price elasticity of demand for fresh fish is perfectly inelastic, how does the quantity demanded respond to a price change?
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If a company wants to increase the quantity of computers sold by 5% and the price elasticity of demand is -2.5, what must the company do?
If a company wants to increase the quantity of computers sold by 5% and the price elasticity of demand is -2.5, what must the company do?
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What is the required price change to reduce electricity consumption by 10% if the price elasticity of demand is -5?
What is the required price change to reduce electricity consumption by 10% if the price elasticity of demand is -5?
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When the price of radios decreases by 5% and quantity demanded increases by 5%, what is the effect on total revenue?
When the price of radios decreases by 5% and quantity demanded increases by 5%, what is the effect on total revenue?
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What characteristic do habitual commodities like tobacco and alcohol have regarding demand?
What characteristic do habitual commodities like tobacco and alcohol have regarding demand?
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What does a positive income elasticity of demand indicate about normal goods?
What does a positive income elasticity of demand indicate about normal goods?
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Which type of goods has an income elasticity of demand between 0 and +1?
Which type of goods has an income elasticity of demand between 0 and +1?
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What does a negative cross elasticity of demand imply about two commodities?
What does a negative cross elasticity of demand imply about two commodities?
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What is the consequence of a rise in income for inferior goods?
What is the consequence of a rise in income for inferior goods?
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Which statement about luxuries is accurate?
Which statement about luxuries is accurate?
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Which scenario correctly illustrates the concept of substitute goods?
Which scenario correctly illustrates the concept of substitute goods?
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How is cross elasticity of demand calculated?
How is cross elasticity of demand calculated?
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What is point elasticity of demand primarily used for?
What is point elasticity of demand primarily used for?
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Which formula correctly represents the point elasticity of demand?
Which formula correctly represents the point elasticity of demand?
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What does arc elasticity of demand measure?
What does arc elasticity of demand measure?
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Inelastic demand is characterized by which of the following statements?
Inelastic demand is characterized by which of the following statements?
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What happens to the demand for a product with perfectly inelastic demand when the price changes?
What happens to the demand for a product with perfectly inelastic demand when the price changes?
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Elastic demand arises when the percentage change in quantity demanded is:
Elastic demand arises when the percentage change in quantity demanded is:
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What is typically ignored when interpreting the coefficient of price elasticity of demand?
What is typically ignored when interpreting the coefficient of price elasticity of demand?
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Which statement best describes elastic demand?
Which statement best describes elastic demand?
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What happens to the quantity demanded of a commodity when its price increases, ceteris paribus?
What happens to the quantity demanded of a commodity when its price increases, ceteris paribus?
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What is the formula for calculating the price elasticity of demand?
What is the formula for calculating the price elasticity of demand?
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In the formula for price elasticity of demand, what does η represent?
In the formula for price elasticity of demand, what does η represent?
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How can the price change be expressed when calculating elasticity?
How can the price change be expressed when calculating elasticity?
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Which of the following describes the price elasticity of demand?
Which of the following describes the price elasticity of demand?
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What could be the effect of a 10% increase in the price of sugar on its quantity demanded?
What could be the effect of a 10% increase in the price of sugar on its quantity demanded?
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When demand for a commodity is elastic, what happens to total revenue when the price decreases?
When demand for a commodity is elastic, what happens to total revenue when the price decreases?
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Which statement about price elasticity of demand is incorrect?
Which statement about price elasticity of demand is incorrect?
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Study Notes
Elasticity
- Elasticity is a measure of responsiveness.
- It shows how much one variable changes in response to a change in another variable.
- Price elasticity of demand is the percentage change in quantity demanded divided by the percentage change in price.
Price Elasticity of Demand
- Shows the responsiveness of quantity demanded to a change in price.
- Measured using the formula: η = (percentage change in quantity demanded) / (percentage change in price)
- η represents the price elasticity of demand.
Calculating Price Elasticity of Demand
- Express price change as a percentage of average price (initial and new price average).
- Express quantity demanded change as a percentage of average quantity (initial and new quantity average).
- Two methods: Point elasticity (for small price changes) and Arc elasticity (for larger price changes).
Point Elasticity of Demand
- Proportionate change in quantity demanded from a very small proportionate change in price.
- Formula applicable for point elasticity of demand: η = (ΔQ/Q) / (ΔP/P) where ΔQ/Q is the percentage change in quantity, ΔP/P is the percentage change in price, Q is the initial quantity and P is the initial price.
Arc Elasticity of Demand
- Measures average elasticity at the midpoint of the chord connecting the two points (initial and new price levels) on the demand curve.
- Formula: η =(ΔQ / [(Q1 + Q2)/2]) / (ΔP / [(P1 + P2)/2])
Interpretation of Price Elasticity of Demand
- The negative sign is ignored in the interpretation, only the absolute value is considered.
- Different interpretations exist.
- Inelastic demand: Percentage change in quantity is less than the percentage change in price. The numeric value of the coefficient is less than 1.
- Elastic demand: Percentage change in quantity demanded exceeds the percentage change in price. The coefficient is usually greater than 1, but less than infinity.
- Perfectly inelastic: Coefficient is zero (demand curve is vertical). Change in price has no effect on quantity demanded.
- Perfectly elastic: Coefficient is infinite (demand curve is horizontal). Any price change will lead to a change in quantity demanded.
- Unitary elasticity: Percentage change in quantity is equal to the percentage change in price. The coefficient is equal to 1.
Determinants of Price Elasticity of Demand
- Number of close substitutes: More substitutes, higher elasticity.
- Expenditure on the commodity: Higher percentage of income spent, higher elasticity.
- Adjustments time: Longer time, higher elasticity.
- Nature of the commodity: Necessities tend to be inelastic.
- Habit: Habit-forming goods are usually inelastic.
Income Elasticity of Demand
- Measures percentage change in quantity demanded resulting from a percentage change in consumer income.
- Formula: ηm = (ΔQ/Q) / (ΔM/M) where ΔQ/Q is the percentage change in quantity, ΔM/M is the percentage change in income, Q is the initial quantity, and M is the initial income.
Normal Goods
- Positive income elasticity of demand.
- Demand increases as income rises.
- Necessities: 0 < ηm < 1; Luxuries: ηm > 1.
Inferior Goods
- Negative income elasticity of demand.
- Demand falls as income rises.
Cross Elasticity of Demand
- Measures percentage change in quantity demanded of one commodity resulting from a percentage change in price of another commodity.
- Formula: ηxy = (ΔQx/Qx) / (ΔPy/Py)
Complementary Goods
- Negative cross elasticity.
- A fall in the price of one leads to an increase in quantity demanded of the other. (e.g., bread and butter).
Substitute Goods
- Positive cross elasticity.
- A fall in the price of one commodity leads to a decrease in the quantity demanded of the other. (e.g., butter and margarine).
Relationship between Elasticity and Total Revenue
- Price elasticity of demand impacts total revenue.
- Elastic demand: Price decrease leads to an increase in total revenue.
- Inelastic demand: Price decrease leads to a decrease in total revenue.
- Unitary elasticity: Price change has no effect on total revenue.
Elasticity of Supply
- Shows how much quantity supplied changes in response to a price change.
- Formula: ε = (percentage change in quantity supplied) / (percentage change in price)
- Factors influencing supply elasticity include time.
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Description
This quiz covers the concepts of elasticity in economics, particularly focusing on price elasticity of demand. It explains the calculations involved and the different types of elasticity, such as point and arc elasticity. Test your understanding of how quantity demanded changes in response to price fluctuations.