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  • About the Economic Futures Hub
  • Unit 1: Economics of the Market
  • Unit 2: UK Economic Activity
  • Unit 3: Global Economic Activity
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Markets

Markets

  • šŸ“Š Introduction to Markets šŸ“Š
  • Combining Supply and Demand
  • āš–ļø Market Disequilibrium: When Things Get Out of Balance āš–ļø
  • What is Market Disequilibrium?
  • What are the effects of changes in demand and supply on equilibrium level?
  • Test Your Knowledge with Scenarios
  • šŸ› ļø What mechanism can solve market disequilibrium? šŸ› ļø
  • What is the Price Mechanism?
  • What are the main functions of the price mechanism?
  • How can the price mechanism solve the market disequilibrium?
  • Price as a basis for market clearing
  • Excess demand
  • Excess supply
  • Are there any real life examples of market clearing in Scotland?
  • Joint demand and competitive demand
  • Joint demand
  • Competitive demand
  • Summary comparison of Joint demand and Competitive demand
  • Knowledge checkpoint: Describe, using an example, what is meant by joint demand
  • Knowledge checkpoint: Compare Joint demand and competitive demand
  • Joint supply and competitive supply
  • Joint supply
  • Competitive supply
  • Summary comparison
  • Knowledge checkpoint: Describe, using an example, what is meant by joint supply.
  • The impact of taxes and subsidies on consumers and producers
  • The impact of taxes on consumers and producers
  • The impact of subsidies on consumers and producers
  • Let’s take a recent real life example of a subsidy:
  • Let’s use a supply and demand diagram to understand the impact of the CJRS subsidy on consumers and producers (businesses):

šŸ“Š Introduction to Markets šŸ“Š

šŸ›’
In economics, a market is any place where these exchanges of goods happen. Whether it's a local farmer's market or a global online marketplace, the fundamental principles are the same. Let's dive in and see how markets operate!

Combining Supply and Demand

šŸ’”
So far, we've explored the supply curve and the demand curve separately. Now, it's time to bring them together to see how markets work!
šŸ’”
When we combine the supply curve (which shows how much producers are willing to sell at different prices) and the demand curve (which shows how much consumers are willing to buy at different prices), we can find the point where they intersect. This point is calledĀ Equilibrium.

āœ… EquilibriumĀ is when there is no tendency for the market price to change. At this point, the quantity demanded equals the quantity supplied.

šŸ‘‰ But what happens if something changes?

āš–ļø Market Disequilibrium: When Things Get Out of Balance āš–ļø

What is Market Disequilibrium?

šŸ’”
Market disequilibrium occurs when the quantity demanded does not equal the quantity supplied at a given price. This results in the market not clearing, leading to either excess demand (shortage) or excess supply (surplus).

šŸ‘‰ Changes in the conditions of demand and supply can shift the equilibrium price and quantity, causing a temporary market disequilibrium until a new equilibrium is established.

What are the effects of changes in demand and supply on equilibrium level?

Go through the figures to see these effects:

Diagram
Change
Equilibrium price
Equilibrium quantity
1
Demand increases
Higher
Higher
2
Demand decreases
Lower
Lower
3
Supply increases
Lower
Higher
4
Supply decreases
Higher
Lower
Please note that the Equilibrium price and quantity are denoted with a star i.e P* and Q*

Test Your Knowledge with Scenarios

šŸ’”
Exam Tip: In your higher economics exam, you may encounter real-life case study scenarios where there may be questions asking you to draw diagrams illustrating the market effects for specific goods.

These questions will test your ability to understand and analyse shifts in supply curves. Pay close attention to the details provided in the case study.

Practice drawing BOTH demand and supply curves for scenarios like the ones below to prepare effectively šŸ‘‡

šŸ“Š
Scenario 1

Situation: Due to a significant shortage of sunflower oil and extremely dry weather conditions in Spain, the production and availability of Spanish olive oil are impacted.

Question:Ā "Draw a diagram to show the effect on the market for Spanish olive oil due to the reduced availability of sunflower oil and abnormally dry weather in Spain.ā€

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😃 Try it for yourself then click here to see the answers:

šŸ“Š
Scenario 2

Situation: The government has introduced a 'fat tax' on unhealthy food and imposed stricter restrictions on advertising unhealthy food, impacting its market dynamics.

Question:Ā "Draw a diagram to show the effect on the market for unhealthy food as a result of the introduction of a ā€˜fat tax’ and increased restrictions on advertising unhealthy food.ā€

‣
😃 Try it for yourself then click here to see the answers:
šŸ“Š
Scenario 3

Situation: Both the EU and US governments have introduced subsidies to support the aircraft industry. However, there has been a worldwide suspension of most air travel due to the COVID-19 pandemic.

Question:Ā "Draw a diagram to illustrate the effects of these subsidies from the EU and US governments, combined with the global suspension of air travel, on the market for aircraft.ā€

‣
😃 Try it for yourself then click here to see the answers:

šŸ› ļø What mechanism can solve market disequilibrium? šŸ› ļø

šŸ’²
The price mechanism is a powerful tool that helps the market adjust and move towards equilibrium, thus solving the market disequilibrium

What is the Price Mechanism?

šŸ’·
The price mechanism is how prices are set in a market based on the interaction between consumers (buyers) and businesses (sellers).
  • ConsumersĀ decide how much they are willing to pay for a product.
  • BusinessesĀ decide how much they want to charge for that product.

These decisions interact in the market, and the price is determined by the forces of supply (how much of a product is available) and demand (how much of a product people want). Essentially, it’s the buyers and sellers together who determine the price of a product.

šŸ‘‰ In short, the price mechanism is the system where supply and demand decide the prices of goods and services.

What are the main functions of the price mechanism?

šŸ¦
Signalling Function
  • Prices act as signals to show where resources are needed.
  • Prices rise and fall based on scarcity (shortage) and surplus (extra supply).
    • šŸ“±Example: If the price of smartphones goes up because everyone wants one, this signals manufacturers to make more smartphones.
    • šŸŠExample: If there are too many oranges and not enough buyers, the price of oranges will drop to encourage people to buy more.
šŸ’°
Incentive Function
  • Prices provide incentives for consumers and producers.
  • Consumers’ choices send information to producers about what they need and want.
    • šŸš™ Example: If more people start buying electric cars, it tells car manufacturers to make more electric cars.
🄔
Rationing Function
  • Prices help ration scarce resources when demand is higher than supply.
  • When there is a shortage, prices go up, so only those who are willing and able to pay can buy the product.
    • šŸŽ®Ā Example: If there is a limited supply of a new video game console, the price may increase, and only those who are willing to pay more will get one.
šŸ›’
Through these mechanisms, prices adjust based on the interaction of supply and demand, helping the market reach equilibrium where the quantity demanded equals the quantity supplied. This entire process usesĀ price as a basis for exchange.

What does ā€œPrice as a basis for exchangeā€ mean?

šŸ„‚
When we say "price as a basis for exchange," it means that price is the value assigned to a good or service, and this value is what people use to make exchanges or trade in a market.

→ Price assigns a specific value to a product or service, making it easier to understand how much something is worth.

  • šŸ­ A candy bar priced at Ā£1 means that the candy bar is worth Ā£1.

→ Prices enable buyers and sellers to agree on the terms of exchange.

  • If you have Ā£1 and want a candy bar, you can exchange your Ā£1 for the candy bar because both you and the seller agree on the price.
šŸ¦
Sometimes the government steps in to control the price mechanism to make essential commodities affordable for everyone, especially for those with lower incomes.

For example:

The Scottish Government supports energy price caps to protect consumers from excessive energy prices. By capping the prices that energy companies can charge, the government helps ensure that energy remains affordable, particularly for low-income households. āš”ļø

Energy Price Guarantee Changes in Autumn Statement | FAI

Energy prices had previously been frozen for two years from October 2022 in the ā€œmini budgetā€ at Ā£2500 per year for the typical household. While the price cap is remaining in place this winter it has…

fraserofallander.org

Energy Price Guarantee Changes in Autumn Statement | FAI

How can the price mechanism solve the market disequilibrium?

Price as a basis for market clearing

šŸ¤‘
ā€œPrice as a basis for market clearing" means that prices adjust to ensure that the quantity of goods supplied equals the quantity demanded, preventing surpluses and shortages and ensuring efficient allocation of resources.

šŸ‘‰ Excess demand and excess supply are states of disequilibrium in a market

  • let’s figure out how the price mechanism works to solve these two states of market disequilibrium by looking at the market for a particular good:

Excess demand

Excess supply

Are there any real life examples of market clearing in Scotland?

šŸŽŖ
Example: During the Edinburgh Festival, there is a high demand for accommodation. If there are more visitors seeking accommodation than available rooms, prices will increase until the number of rooms available matches the number of visitors willing to pay the higher price.

→ Prices of accommodation for the 2024 Fringe Festival has increased by up to 1500% due to the excess demand!

Edinburgh Fringe Festival accommodation' costs soar by as much as 1,500 percent

Landlords and hotels have been branded 'greedy' by performers with Jason Manford saying he is making a loss even after selling out.

uk.news.yahoo.com

Edinburgh Fringe Festival accommodation' costs soar by as much as 1,500 percent

Joint demand and competitive demand

šŸ–‡ļø
Joint demand and competitive demand are key concepts in economics that describe how different goods interact in the market. Let's explore these concepts in further detail!

Joint demand

šŸ¤³šŸ½
Think about when you first buy a new smartphone. If you want to keep your phone in good condition, you should also buy a phone case. This way, you can enjoy your new phone without worrying about it getting damaged.

šŸŽ® Similarly, if you buy a new video game console, you will also need games to play on it to make the most of your purchase.

These are examples ofĀ complementary goods, which are products used together. Complementary goods automatically have joint demand. For instance:

  • You use a smartphone and a phone case together.
  • You use a video game console and video games together.
  • You use milk and tea to make a great morning drink.
  • You use lipliner with lipstick to create the perfect lip combo.
šŸ”—
Definition: Joint demandĀ is when the demand for one good or service is directly related to the demand for another.

šŸ‘‰ This means that the demand for two or more goods is interdependent or complementary.

šŸ¤”
Let’s think about it: If there is an increase in the demand for coffee machines, the demand for coffee beans also increases. Why?

Let’s illustrate this example in a demand and supply diagram:

Competitive demand

šŸ¤šŸ½

Think about the name ā€œcompetitive demand.ā€ The word "competitive" suggests rivalry, tension, and competition.

What goods/services are normally in competition with each other? Can you think of any?

Here are some examples 😁

  • Coca-Cola vs. Pepsi
  • Coffee vs. Tea
  • O2 vs. Vodafone
  • Tesco vs. Asda

šŸ”” Hopefully this is ringing a bell - what do we call these kind of goods? Substitute goods!

šŸ‘‰ Remember substitute goods are products that can be used in place of each other.

⭐
Definition: Competitive demand refers to the demand for a good or service when there are many available substitutes.
  • šŸ›ļø Tesco vs. Asda. Since these services are substitutes, a consumer in theory gets equal satisfaction whether they buy from Tesco or Asda. Therefore, competitive demand means that consumers can derive equal satisfaction from substitute products.
⭐
Let’s think about it: If there is an increase in the demand for shopping at Tesco, the demand for Asda goods decreases. Why?

Let’s illustrate this in a demand and supply diagram:

Summary comparison of Joint demand and Competitive demand

Joint demand
Competitive demand
Consumers require a combination of 2 or more products for maximum consumer satisfaction
Consumers can derive equal satisfaction from substitute products
These are complementary goods
these are substitute goods
for example, smartphones and smartphone cases
for example, 02 and Vodafone
‣

Knowledge checkpoint: Describe, using an example, what is meant by joint demand

‣

Knowledge checkpoint: Compare Joint demand and competitive demand

Joint supply and competitive supply

Let's briefly introduce two more important concepts in economics: joint supply and competitive supply.

Joint supply

🌿
Look at what you are wearing right now. It’s very likely that your clothes contain the most popular material in the world - cotton!

šŸ’­ Did you know that during the processing of cotton to make fabrics,Ā cottonseedĀ is a major by-product? Cottonseed can be used to produce cottonseed oil, which is used in cooking and food products.

So, when we talk about joint supply:

  • An increase in the production of cotton for fabrics results in more cottonseed being produced.
  • This demonstrates joint supply, where the production of one good (cotton) leads to the production of a by-product (cottonseed).
šŸ
Ā Definition: Joint supply is where an increase or decrease in the supply of one good leads to an increase or decrease in the supply of a by-product.

We can illustrate our cotton and cottonseed example in a demand and supply diagram:

Competitive supply

šŸ›’
Supermarket's Competitive Supply Decision

Let's use a supermarket sstrategic decision to introduce a new line of vegan products amidst a growing trend: 8.6 million people in the UK are following a meat-free diet:

🄩
The supermarket needs to allocate its limited resources—such as shelf space, marketing budget, and supplier contracts—between these new vegan goods and their existing products, like their range of meat products.
  • šŸ‘‰ This is an example of competitive supply, where the supermarket must decide which product line will attract more customers and generate more profits.
  • šŸ‘‰ If the supermarket dedicates more resources to vegan products, they might have to reduce the resources allocated to other popular items - there is an opportunity cost here!
    • 🌱 Opportunity Cost: There is trade-off involved in resource allocation.
    • This choice requires the supermarket to evaluate which product line will yield the highest customer satisfaction and profitability.
šŸ‘ŒšŸ½
Definition: Goods in competitive supply are alternative products a firm can produce with its given resources.

We can illustrate our supply of vegan and meat products in a demand and supply diagram:

Summary comparison

Joint Supply
Competitive Supply
The production of one good automatically results in the production of another
Resources are allocated between different products that compete for those resources
These are by-products that are produced together
These products compete for limited resources like land, shelf space, or budget
For example, Cotton and cottonseed
For example, vegan products and meat products in a grocery store
‣

Knowledge checkpoint: Describe, using an example, what is meant by joint supply.

The impact of taxes and subsidies on consumers and producers

šŸ•“šŸ½
Taxes and subsidies influence consumer choices and producer behaviour in the market. They shape pricing strategies, alter demand patterns, and incentivise or disincentivise production, all under the watch of government economic policies.

The impact of taxes on consumers and producers

šŸ’·
Taxes are a form of government intervention, influencing both consumers and producers in the market. They serve as a revenue source for the government, enabling funding for various public services and initiatives.

→ Taxes alter the prices consumers pay and the costs producers incur, affecting consumption patterns and production decisions across the economy.

If we take the example of a tax on the use of gasoline (petrol):

šŸ˜†
Think of consumer and producer surplus as measures of welfare for consumers and producers.

When taxation reduces producer surplus and consumer surplus, it means:

  • For Consumers: Prices increase, reducing their purchasing power and satisfaction from consuming goods.
  • For Producers: Profits decrease, lowering their motivation to produce more goods and invest in production.

Overall, this reduces economic efficiency and welfare in the market.

Summary:

šŸ’”
Before tax:

Consumer surplus: A + C + E

Producer surplus: D + F + B

šŸ’”
After tax:

Government Tax revenue: C + D

Consumer surplus: A

Producer Surplus: B

Tax burden to the consumer: C

Tax burden to the producer: D

Deadweight loss: E + F

The impact of subsidies on consumers and producers

šŸ“˜
Definition: A subsidy is any form of government financial support offered to producers and occasionally consumers.

šŸ” Think of a subsidy as grants/aids from the government to businesses to keep their operations running.

Let’s take a recent real life example of a subsidy:

🦠
During the COVID-19 Pandemic:

Businesses suffered significant losses due to reduced activity. Many couldn't afford to keep paying their workers and needed support to keep going. → On 20th March 2020 the Coronavirus Job Retention Scheme (CJRS) was announced to provide grants to employers during the Covid-19 pandemic in the UK.

😷
CJRS

šŸŽÆĀ Objective: Prevent mass unemployment by helping businesses retain employees during periods of reduced economic activity.

šŸ’¼Ā How It Worked: The government paid 80% of employees' wages (up to a certain limit) for hours not worked, allowing employers to keep staff on the payroll even if they couldn't operate normally.

šŸ“ˆĀ Impact: This subsidy helped millions of workers across the UK, including Scotland, maintain their jobs and incomes during the pandemic.

→Read more about the CJRS’s impact here:

Has furlough prevented household financial distress during the pandemic? - Economics Observatory

The Coronavirus Job Retention Scheme may have helped to prevent a big rise in the number of UK households in financial distress. But its effects have not been equal, and those on lower incomes have been more likely to cut their spending, draw on savings and face financial hardship.

www.economicsobservatory.com

Has furlough prevented household financial distress during the pandemic? - Economics Observatory

Let’s use a supply and demand diagram to understand the impact of the CJRS subsidy on consumers and producers (businesses):

šŸ“Š
Summary Impact of CJRS on Market Equilibrium:
  • Producers: Increased revenue and profit due to lower production costs and government support.
  • Consumers: Increased consumer surplus due to lower prices.
  • Market: Lower equilibrium price, increased equilibrium quantity, and higher overall welfare.

This analysis shows how the CJRS subsidy during the COVID-19 pandemic helped stabilised both supply and demand, supporting the overall economy by maintaining employment and consumer spending.

šŸ’”
Subsidies can also be used to directly help consumers afford essential items.

For instance, The Fraser of Allander Institute found that during crises, subsidies aimed at households can lower living costs, especially benefiting lower-income families who spend more of their income on energy.

Subsidising businesses helps maintain economic production but doesn't directly reduce living expenses. The best approach depends on policy goals: for fair distribution, demand-side subsidies targeted at consumers are effective, whereas supply-side subsidies support economic output. Often, a combination of both policies is used to achieve balanced outcomes.

What’s the impact of different forms of energy subsidies in crisis time? | FAI

Price subsidies, income subsidies, tax reductions and windfall taxes. New research by @GeoffroyPortier and @gioelef evaluates the effects of energy policies employed during the energy crisis.

fraserofallander.org

What’s the impact of different forms of energy subsidies in crisis time? | FAI
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Created by Economic Futures. We are hosted by the FAI. Contact us at economicfutures@strath.ac.uk for feedback or collaboration.

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