Supply and Demand Quiz

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Questions and Answers

What happens to the demand for inferior goods when income decreases?

  • Demand increases (correct)
  • Demand fluctuates unpredictably
  • Demand remains constant
  • Demand decreases

Which statement best describes the relationship between price and quantity demanded for perfectly inelastic demand?

  • Demand increases as price increases
  • Demand does not change when price changes (correct)
  • Demand decreases as price decreases
  • Demand varies significantly with price changes

What is the coefficient of price elasticity when demand is unitary elastic?

  • Zero
  • One (correct)
  • Less than one
  • Greater than one

When the price elasticity of demand coefficient is greater than one, what does it indicate?

<p>Demand is price elastic (C)</p> Signup and view all the answers

How is the coefficient of price elasticity of demand typically calculated?

<p>Percentage change in quantity demanded divided by percentage change in price (D)</p> Signup and view all the answers

What characterizes the demand curve for inelastic demand?

<p>Downward sloping curve (A)</p> Signup and view all the answers

What effect would a significant increase in income have on the demand for inferior goods?

<p>Demand decreases (D)</p> Signup and view all the answers

If the price of a good increases by 10% and the quantity demanded drops by 30%, which statement about the price elasticity of demand is true?

<p>Demand is elastic (C)</p> Signup and view all the answers

What is a typical feature of inferior goods?

<p>People buy less when their incomes rise (B)</p> Signup and view all the answers

Which of these best describes the elasticity of demand for luxury items?

<p>Elastic (A)</p> Signup and view all the answers

How does the availability of close substitutes impact the price elasticity of demand?

<p>It makes the demand more elastic. (D)</p> Signup and view all the answers

Which factor is likely to make demand more inelastic?

<p>Strong brand loyalty. (C)</p> Signup and view all the answers

What happens to total revenue when demand is inelastic and the price is reduced?

<p>Total revenue decreases. (B)</p> Signup and view all the answers

Which type of elasticity indicates that a change in price does not alter the quantity demanded at all?

<p>Perfectly inelastic demand. (D)</p> Signup and view all the answers

Which scenario describes a product with unitary elastic demand?

<p>Percentage change in price equals the percentage change in quantity demanded. (B)</p> Signup and view all the answers

When considering price elasticity of demand, what does a coefficient greater than one indicate?

<p>Elastic demand. (A)</p> Signup and view all the answers

How does habitual consumption affect price elasticity of demand?

<p>It leads to inelastic demand. (C)</p> Signup and view all the answers

Which of the following is a characteristic of perfectly elastic demand?

<p>Consumers will buy any amount at one price. (D)</p> Signup and view all the answers

What role does consumer income play in determining demand elasticity?

<p>Products that take up a high percentage of income tend to have more elastic demand. (A)</p> Signup and view all the answers

What is one of the limitations of elasticity assessment for producers?

<p>Data used can often be inaccurate or incomplete. (B)</p> Signup and view all the answers

In a market with both necessities and luxuries, which statement is true regarding their demand elasticity?

<p>Necessities typically have inelastic demand while luxuries are more elastic. (D)</p> Signup and view all the answers

How does price discrimination benefit businesses?

<p>It allows charging different prices based on demand elasticity. (D)</p> Signup and view all the answers

What is an example of a factor leading to price inelastic demand?

<p>High necessity of the good. (D)</p> Signup and view all the answers

What happens to the demand for rubber duckies as the price of oil increases?

<p>Demand decreases as consumers might skip buying them. (A)</p> Signup and view all the answers

How do consumers typically respond to higher gasoline prices?

<p>They may forego road trips altogether. (B)</p> Signup and view all the answers

What is indicated by a rightward shift of the demand curve for laptops?

<p>Increased quantity demanded at all price levels. (A)</p> Signup and view all the answers

What effect does a decrease in income generally have on the demand for normal goods?

<p>Demand decreases. (A)</p> Signup and view all the answers

Why might demand for the cheapest car on the market decrease when income rises?

<p>Consumers shift their preference to higher-quality cars. (B)</p> Signup and view all the answers

What does the demand curve represent?

<p>How price changes influence consumer purchasing behavior. (A)</p> Signup and view all the answers

What occurs when the price of oil rises significantly?

<p>Demand for some products decreases as consumers seek substitutes. (C)</p> Signup and view all the answers

In which scenario would the demand for a normal good typically shift to the left?

<p>When consumer incomes decrease. (A)</p> Signup and view all the answers

What might consumers do when the prices of goods made from oil rise?

<p>Look for cheaper alternatives. (A)</p> Signup and view all the answers

How is the demand for products like gasoline affected by price increases?

<p>Consumers buy less, but still demand some. (A)</p> Signup and view all the answers

Which of the following illustrates the law of demand?

<p>Lower prices lead to increased quantity demanded. (A)</p> Signup and view all the answers

What can be inferred about a good that shifts left when income increases?

<p>It is an inferior good. (A)</p> Signup and view all the answers

What happens to the quantity demanded of a laptop if the price increases?

<p>It decreases. (C)</p> Signup and view all the answers

In what way does a consumer's perception of a product's value influence demand?

<p>Higher perceived value typically increases demand at given price points. (C)</p> Signup and view all the answers

If a consumer values oil very highly when prices rise, what does that imply about their behavior?

<p>They will continue purchasing despite higher costs. (A)</p> Signup and view all the answers

What indicates that demand is inelastic?

<p>The absolute value of elasticity is less than 1. (B)</p> Signup and view all the answers

Why do adult smokers tend to have a smaller elasticity of demand compared to youth smokers?

<p>Adults generally have more disposable income. (B)</p> Signup and view all the answers

If the absolute value of elasticity of demand is greater than 1, what does this imply?

<p>Price changes have a larger effect on quantity demanded. (A)</p> Signup and view all the answers

In the context of electricity demand, what would likely happen if the price of electricity is increased?

<p>Total revenue would likely increase due to inelastic demand. (A)</p> Signup and view all the answers

What is the outcome when the elasticity of demand equals 1?

<p>A price increase will lead to no change in total revenue. (D)</p> Signup and view all the answers

What is typically the consumer response when a good has elastic demand?

<p>A small price increase results in a large drop in quantity demanded. (C)</p> Signup and view all the answers

Why might a company choose to lower prices when demand is elastic?

<p>To increase total revenue through higher quantity sold. (D)</p> Signup and view all the answers

What does a demand elasticity ratio of less than 1 signify?

<p>Consumers remain largely unresponsive to price changes. (B)</p> Signup and view all the answers

In terms of revenue, if demand is inelastic, how should a company adjust its prices?

<p>Raise prices to increase overall revenue. (A)</p> Signup and view all the answers

What primarily determines whether a business should increase or decrease prices to generate more revenue?

<p>Customer sensitivity to price changes (D)</p> Signup and view all the answers

What is the formula for calculating the elasticity of demand?

<p>Percentage change in quantity demanded over percentage change in price (D)</p> Signup and view all the answers

If a product's price increases by 10% and the quantity demanded decreases by 5%, what is the elasticity of demand?

<p>-0.5 (C)</p> Signup and view all the answers

When a business raises its prices but does not see a significant decrease in quantity demanded, what can be said about its elasticity of demand?

<p>Demand is inelastic (C)</p> Signup and view all the answers

What does the size of the elasticity number indicate about consumer response?

<p>How much consumers will react to a price change (A)</p> Signup and view all the answers

Which scenario represents a business likely to decrease prices in order to generate more revenue?

<p>An airline (B)</p> Signup and view all the answers

Why is percentage change preferred over absolute change when calculating elasticity?

<p>It standardizes changes across different price points (D)</p> Signup and view all the answers

In the context of elasticity of demand, what does an elasticity value of less than 1 imply?

<p>Demand is inelastic (A)</p> Signup and view all the answers

If a business increases its prices but finds that revenue does not increase, what might this suggest about its demand?

<p>Demand is elastic (D)</p> Signup and view all the answers

What is meant by 'elastic demand'?

<p>Demand where the percentage change in quantity is greater than the percentage change in price (C)</p> Signup and view all the answers

If raising the price of a product leads to a small decrease in quantity demanded, what does this indicate about its elasticity?

<p>It is price inelastic (B)</p> Signup and view all the answers

What happens to revenue when the price of a product with elastic demand is increased?

<p>Revenue decreases (C)</p> Signup and view all the answers

Why might a high-end bookstore consider giving educator discounts?

<p>To increase the quantity demanded (B)</p> Signup and view all the answers

Which of the following best illustrates the relationship defined by the Law of Demand?

<p>Higher prices lead to lower quantity demanded (D)</p> Signup and view all the answers

What relationship does the demand curve illustrate?

<p>As price increases, quantity demanded decreases. (C)</p> Signup and view all the answers

At which price is the demand for oil at its lowest, according to the example provided?

<p>$55 per barrel (C)</p> Signup and view all the answers

Which of the following is considered a high-value use of oil?

<p>Providing jet fuel for airplanes (D)</p> Signup and view all the answers

What happens to the quantity demanded for oil as the price decreases from $20 to $5 per barrel?

<p>It increases. (A)</p> Signup and view all the answers

What is shown on the vertical axis of a demand curve graph?

<p>Price (A)</p> Signup and view all the answers

Which statement best describes the nature of demand curves for different products?

<p>Each good has a unique demand curve with similar principles. (B)</p> Signup and view all the answers

What is the quantity demanded when oil is priced at $20 per barrel?

<p>25 million barrels (A)</p> Signup and view all the answers

What effect do low oil prices have on the demand of high and low-value products?

<p>Both high and low-value products are purchased. (C)</p> Signup and view all the answers

Flashcards

Demand Curve

A curve showing the relationship between the price of a good and the quantity demanded at that price. Lower prices generally lead to higher demand.

Increased Demand

A situation where people buy more of a good when its price decreases. Example: Buying lots of items during a sale.

High-Value Uses

Goods or services for which there are few alternatives. For example, jet fuel is a high-value use for oil because there are limited substitutes.

Low-Value Uses

Goods or services for which there are many alternatives. For example, gasoline or plastic are low-value uses for oil because there are numerous substitutes.

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Quantity Demanded

The quantity of a good people are willing to purchase at a given price. Usually, higher demand occurs at lower prices.

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Price

The price at which a good is sold in a market. This can be affected by supply and demand forces.

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Supply

The total amount of a good that is available for purchase in a market. This is influenced by factors like production and availability.

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Supply and Demand

The concept that explains how the price of a good is determined by the interaction of the forces of supply and demand.

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Price Elasticity of Demand (PED)

The responsiveness of demand to changes in price. It measures how much the quantity demanded changes for each percentage point change in price.

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Perfectly Inelastic Demand

Demand is perfectly inelastic when the quantity demanded does not change at all, regardless of the price change. The demand curve appears as a vertical line.

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Inelastic Demand

Demand is inelastic when the quantity demanded changes less than proportionally to a price change, meaning the demand curve is relatively flat.

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Unitary Elastic Demand

Demand is unitary elastic when the quantity demanded changes proportionally to a price change. This means a 10% price increase leads to a 10% decrease in quantity demanded.

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Elastic Demand

Demand is elastic when the quantity demanded changes more than proportionally to a price change, meaning the demand curve is relatively steep.

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Inferior Good

A good for which demand increases as income decreases.

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Normal Good

A good for which demand decreases as income decreases.

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Income Effect

The change in demand caused by a change in income.

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Price Effect

The impact of a price change on demand, keeping all other factors constant.

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Price Elasticity of Demand

The sensitivity of demand to price changes. It measures how much quantity demanded changes in response to a price change.

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Elasticity Formula

The percentage change in quantity demanded divided by the percentage change in price.

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Unit Elasticity

The point where a change in price leads to an equal percentage change in quantity demanded.

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Law of Demand

The relationship between price and quantity demanded where higher prices lead to lower quantities demanded.

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Revenue

The total revenue a business generates from selling its products.

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High Elasticity

The value of elasticity that indicates consumers are very responsive to price changes.

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Low Elasticity

The value of elasticity that indicates consumers are not very responsive to price changes.

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Educator Discount

The practice of offering a discounted price to a specific group of customers.

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Elasticity and Revenue

The situation of price and quantity changes that lead to an increase in total revenue.

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Elasticity and Price Increases

The situation where a price increase leads to a decrease in total revenue.

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Elasticity and Price Decreases

The situation where a price decrease leads to an increase in total revenue.

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Elasticity of Demand

A measure of how much consumers respond to changes in a product's price, expressed as a negative number.

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Shift in Demand

The change in a good's demand due to a factor other than price, causing the entire demand curve to shift. Examples include a change in income, consumer preferences, or prices of related goods.

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Demand Increase

A shift in the demand curve to the right, indicating an increase in demand for that good.

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Demand Decrease

A shift in the demand curve to the left, indicating a decrease in demand for that good.

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Reservation Price

The price at which a buyer is indifferent between buying or not buying a good.

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Complementary Goods

Goods that are used together. For example, gasoline and cars. If the price of gasoline increases, the demand for cars might decrease.

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Substitute Goods

Goods that can be used in place of each other. For example, tea and coffee. If the price of tea increases, the demand for coffee might increase.

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Consumer Valuation

The willingness to pay for a product or service, determined by the value a consumer places on it.

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Change in Quantity Demanded

A change in the quantity demanded of a good in response to a change in its own price. This reflects the movement along the existing demand curve.

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Number of Close Substitutes

The number of close substitutes available in the market. More substitutes means consumers can easily switch to alternatives if the price of a product increases, making demand more elastic.

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Price Relative to Income

The proportion of a consumer's income spent on a product. Products that take up a larger portion of income tend to have more elastic demand because consumers are more sensitive to price changes.

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Cost of Switching

The cost involved in switching between different products. Products where switching is expensive tend to have less elastic demand because consumers are less likely to switch, even if the price increases.

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Brand Loyalty and Habitual Consumption

The tendency of consumers to stick with a particular brand or product due to habit or preference. Brand loyalty leads to less elastic demand, as consumers are less price-sensitive.

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Degree of Necessity or Luxury

The extent to which a product is considered a necessity or a luxury. Necessities tend to have less elastic demand because people need them regardless of price. Luxuries tend to have more elastic demand.

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Total Revenue

Total revenue is the total amount of money a business earns from selling its products. It is calculated by multiplying the price per unit by the quantity sold.

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Elasticity of Demand and Total Revenue

The relationship between price elasticity of demand and total revenue. When demand is elastic, a price decrease leads to an increase in total revenue. When demand is inelastic, a price decrease leads to a decrease in total revenue.

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Price Discrimination

A pricing strategy where a business charges different prices for the same product to different customers. This is often used to take advantage of different demand elasticities among customers.

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Surge Pricing

A form of dynamic pricing used by companies like Uber, where prices fluctuate based on demand. Prices tend to go up during peak times when demand is high.

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Limitations of Elasticity

The price elasticity of demand can be estimated but not always perfectly known. The elasticity of demand can also vary widely by region, time period, and product variations.

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Unit Elastic Demand

The situation where the percentage change in quantity demanded is equal to the percentage change in price. The absolute value of the elasticity of demand is equal to 1. This means that total revenue stays the same even when the price changes.

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Price Increase with Inelastic Demand

In the case of inelastic demand, a price increase will lead to an increase in total revenue. This is because the increase in price outweighs the decrease in quantity demanded.

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Price Decrease with Elastic Demand

In the case of elastic demand, a price decrease will lead to an increase in total revenue. This is because the increase in quantity demanded outweighs the decrease in price.

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Youth vs. Adult Smokers

The sensitivity of youth smokers to price changes is likely to be higher than that of adult smokers. This is because youth smokers may have less disposable income and are less addicted to nicotine.

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Nicotine Addiction and Elasticity

The addictive nature of nicotine makes it likely that adult smokers will be less sensitive to price changes. They are more entrenched in their habit and may be willing to pay higher prices to continue smoking.

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Inelastic Demand for Electricity

The tendency of individuals to consume the same amount of electricity despite price changes indicates that demand for electricity is inelastic. This is likely due to limited substitutes and the essential nature of electricity.

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Elastic Demand for Airline Tickets

The responsiveness of airline ticket buyers to price changes indicates that demand for airline tickets is elastic. This is likely due to the availability of substitutes (for example, traveling by car or train).

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Study Notes

Supply and Demand

  • Supply and demand are fundamental economic concepts, typically represented graphically.
  • Demand curves illustrate the quantity of a good consumers will buy at different prices.
  • Lower prices lead to increased quantity demanded, as seen on sales days like Black Friday.
  • Every good/service has its own demand curve, exhibiting a negative relationship between price and quantity demanded.
  • Oil demand curve shows varying quantity demanded at different prices (e.g., 5 million barrels at $55/barrel, 50 million barrels at $5/barrel).
  • Oil has both high-value uses (like jet fuel) and low-value uses (like gasoline).
  • High oil prices decrease demand for low-value uses, with only high-value users remaining.

Demand Curves and Goods

  • Demand curves show how quantity demanded changes with price for different goods.
  • Laptops and cars are examples, both following the law of demand (higher price, lower quantity demanded; lower price, higher quantity demanded).
  • Income affects demand for different goods differently.
  • Normal goods have increased demand with higher income (laptop).
  • Inferior goods have decreased demand with higher income (cheapest car).

Price Elasticity of Demand (PED)

  • PED measures demand's responsiveness to price changes.
  • PED formula: percentage change in quantity demanded / percentage change in price.
  • PED values:
    • 0: Perfectly inelastic demand (no change in quantity demanded with price changes).
    • 0-1: Inelastic demand (quantity demanded is less responsive to price changes).
    • 1: Unitary elastic demand (percentage changes in price and quantity are equal).
    • 1: Elastic demand (quantity demanded is more responsive to price changes).

  • Factors influencing PED:
    • Number of close substitutes: More substitutes = more elastic demand.
    • Price relative to income: Higher price relative to income = more elastic demand.
    • Cost of switching: Higher switching costs = less elastic demand.
    • Brand loyalty/habits: Strong brand loyalty = less elastic demand.
    • Necessity vs. luxury: Necessities = inelastic demand, luxuries = elastic demand.
  • PED and Total Revenue:
    • Inelastic demand: Price increase leads to increased total revenue.
    • Elastic demand: Price decrease leads to increased total revenue.
    • Unitary elasticity: Price change has no effect on total revenue.

Elasticity of Demand and Pricing

  • Elasticity is how sensitive consumers are to price changes.
  • Formula: Percentage change in quantity demanded / percentage change in price. Negative sign indicates inverse relationship between price and quantity demanded.
  • Absolute value is used, as the sign is already implicit.
  • Elasticity < 1: Inelastic demand (small change in quantity demanded for a large price change). Increased price leads likely to increased revenue; decrease in price leads likely to a decrease in revenue.
  • Elasticity > 1: Elastic demand (large change in quantity demanded for a small price change). Increased price leads likely to a decreased revenue; decrease in price leads likely to an increase in revenue.
  • Elasticity = 1: Unitary elastic demand (percentage change in quantity demanded equals percentage change in price).
  • Youth smokers tend to be more price-sensitive than adult smokers.
  • Factors that influence elasticity include income, addiction (nicotine), and disposable income.
  • Electricity demand is inelastic, leading to increases in revenue when prices increase. Airlines have elastic demand, so low rates lead to higher revenue.

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