5 Using Supply and Demand

There is a law of demand and a demand curve.

The law of supply states that there is a law of supply.

They give a good answer demand and supply analysis.

Early in any economics course, you must learn about supply and demand.

Let's start with demand.

People want a lot of things, but they don't demand as much because they can pay.

I want to own a car.
If I really wanted one, I'd mortgage everything I own, increase my income by doubling the number of hours I work, and get a car.
I don't do any of those things, so I don't demand a Ferrari.

I would buy one if it cost $30,000, but from my actions it's clear that I don't demand it.

The quantity you demand at a low price is different from the quantity you demand at a high price.
The quantity you demand varies with price.

The market limits how much people demand by setting prices.

As prices go up, people buy less goods.
People buy more goods when their prices go down.
The price mechanism sees that what people demand matches what's available.

As price falls, other things are constant.

As price goes up, so goes quantity demanded.

As prices change, people change how much they're willing to buy.

People will buy something else if the price goes up.

If the money price of more cable channels stays the same, you're likely to drop some channels and subscribe to a streaming service.

Think of something you'd really like but can't afford and see that the law of demand makes sense.

You and other consumers will be more likely to buy it if the price is halved.
As the price goes down, the quantity demanded goes up.

When the price goes up, demand goes down.

When the price goes down, there are license plates.
The quantity demanded by the North Carolina state legislature goes up.

It's the law of demand in action if other things stay the same.

The law of demand states that the quantity demanded of a good is related to the price of that good.

The demand curve slopes downward.

The law of demand states that the quantity demanded goes down as the price goes up.
The price and quantity demanded are related.

Unless they were important, I wouldn't have a law of demand.

The price of cars and the number of cars purchased go up over the course of two years.

The law of demand states that the number of cars purchased should fall when the price goes up.
The data shows that individuals' income has increased.
Other things weren't the same.

The law of demand decreases the num ber of cars bought when the price is increased.

The quantity demanded at every price is increased by the rise in income.
That increase in demand outweighs the decrease in quantity demanded that results from a rise in price, so more cars are sold.
If you want to study the effect of price alone, you need to make adjustments to hold income constant.
The phrase "other things constant" is an important part of the law of demand.

The weather is one of the things that are held constant.

If you want to make a valid study of the effect of an increase in the price of a good on the quantity demanded, those other factors must remain constant.
You have to be careful when you say that when price goes up, quantity demands go down.
It's likely to go down, but it's possible that something else has changed.

To distinguish between the effects of price and the effects of other factors on how much a good is demanded, economists have developed the following terminology.

There is a distinction between demand and quantity.

This reduces the amount of money.

The entire demand curve is affected by a change in any thing other than price.

To understand the difference between a movement along a demand curve and a change in a curve and a shift in demand, you need to understand an example.

There is a shift in demand in Singapore.

Con siderable means that there is a lot of traffic.

The fee charged to use roads was increased and the public transportation system was expanded.

Let's look at a few of them.

We saw that a rise in income increases the demand for goods.
This is true for most goods.
Individuals can afford more of the goods they want as their income increases.

These are not unusual goods.

Income increases reduce demand for inferior goods.
Mass transit is an example.
A person with more money will stop riding the bus to work if she can't afford a car or a parking space.

The price of other goods should be considered.

Demand will be affected by the prices of other goods because people make their buying decisions based on the price of related goods.
The price of jeans would go from $25 to $35, but the price of khakis would stay the same.
khakis are a better choice for pants next time.

They are not regulars.

When the price of a substitute increases, demand for the good whose Q3 Explain the effect of each price has remained the same will increase.
Consider another example.
The demand for new movie tickets will fall if the price falls.
You're likely to computers if you increase the number of times you go to the movies.
The price of computers goes down by the amount of popcorn you buy.
The lower the price of a movie ticket, the higher it is.

The economy's total income increases.

Taxes and subsidies are examples of shift factors.

Taxes on consumers increase the cost of goods and reduce demand for them.
Subsidies to consumers have a different effect.
Consumers load up on products to avoid sales taxes when states host tax free weeks.
During the tax holiday, demand for retail goods increases.

There are many other factors besides the ones listed.

A shift factor is the price of the good itself.
While economists agree that shift factors are important, they don't believe that they affect how much good people buy.
The law of demand is central to economists' analysis.

Let's say that the price of Amedei chocolates goes down.

You won $1 million in a lottery.
You've got it if you answered: It shifts out to the right; it remains unchanged; and it shifts out to the right.

In Chapter 2, I emphasized the importance of graphs and graphical analysis in introductory economics.

The demand curve can be graphed.

Figure 4-3(a) describes Alice's demand for Amazon Prime.

At a price of $4, Alice will rent six movies per week, and at a price of $1 she will rent nine.

There are four points about the relationship between the number of movies Alice rents and the price of renting them.

The relationship follows the law of demand when it comes to rental prices.
The table wouldn't give us any useful information without the time dimensions.
Nine movie rentals per year is not the same as nine movie rentals per week.
The ninth movie rental doesn't significantly differ from the first, third, or any other movie rental.
The analysis assumes that everything else is held constant.

The demand curve is the same as the demand table.

The law of demand holds as the demand curve is downward-sloping.

The point on the curve is determined by the combination of price and quantity in the table.

The points are connected with a line.

She will pay any price within the shaded area to the left of the demand curve.

She's willing to rent three movies for $7 each.

Market demand curves are talked about more than individual demand curves.

Carmen is an individual.

Alice, Bruce, and Carmen want a total of five movie rentals.

The market for movie rentals is made up of them.

The price is given in column 5.

The total market demand curve can be added together.

Figure 4-4(b) shows demand curves for Alice, Bruce, and Carmen.

The total demand curve is the sum of the individual demand curves.
For each price, we can do that.
We get the same total market demand curve.

Firms don't measure individual demand curves so they don't sum them up in this fashion.

They estimate market demand using a statistical method.

It gives you a good sense of where market demand curves come from by showing you how the market demand curve is the sum of the individual demand curves.

Existing demanders buy more at lower prices.

New demanders enter the market at lower prices.

The mirror image of demand is supply.

Indi Six Things to Remember control the factors of production--inputs, or about a Demand Curve resources, necessary to produce goods.
The demand curve follows the law of demand: demand for those factors.

When price goes up, you want to rest rather than weed.

You hire someone else.

Someone else has a time that decides she would prefer more income over rest.

She trades labor for money.

The quality of each unit is the same as her supply.

The prices remain the same for a large number of goods and services.

The demand curve assumes that everything else is goods.

Let's look at a simple example.

You are a taco techni ments along the demand curve.
You give your labor to the market.
The taco thing is on demand and the company demands your labor.

The ability of firms to transform factors of production into usable goods is one of the factors that affect supply for produced goods.

The supply process of produced goods is not easy to understand.

Supply of produced goods involves many layers of firms, each of which has a different process for handling in-process goods.

Nonproduced goods are more directly supplied.

Individuals give their labor.

An independent con tractor can fix your washing machine.

The contractor gives his labor to you.

The process by which firms transform factors of production into usable goods and services is part of the analysis of the supply of produced goods.

The law of supply is related to the law of demand.

As price goes up, quantity supplied goes up as well.

As price falls, quantity supplied falls as well.

Just as quantity demanded is determined by price, quantity supplied is determined by price.

The law of supply is important to the invisible hand's ability to coordinate individuals' actions.

The law of supply is based on a firm's ability to switch from producing one good to another.

The supply curve Price per unit is upward-sloping when the price of a good goes up.

The quantity supplied is good to the market.

Farmers will grow less soybeans and more corn if the price of corn goes up and the price goes down.

There's a second explanation for the law of supply with firms.

If firms' costs are constant, a higher price means higher profits.
The law of supply states that the expectation of higher profits leads to an increase in put as prices go up.

Suppliers are not allowed to charge more than the market price.

Suppliers would be happy to charge a higher price if they could escape the market's hand.
Fortunately for consumers, a higher price encourages other suppliers to begin selling movies.
Suppliers in the market set a limit on the price they can charge.

The supply curve slopes upward to the right.

The law of supply applies to that upward slope cap.

The law of supply is similar to the law of demand.

If the price of soybeans goes up and quantity goes down, you'll look for something else that has changed.

Your explanation would be that if there was no drought, the quantity would have increased in response to the rise in price, but because there was a shortage, the price went up.

If the law seems to have been broken, economists look for other variables that have changed.

Shift factors are the other variables that might change.

The same distinctions are made for supply and demand.

This makes rise.

The entire supply curve is a graphical representation of how much will be offered for sale at various prices.

The effects of a change in price and the effects of shift factors on how much is supplied are two different things.

Let's consider an example of the supply of gasoline.

Hurricane Harvey hit the Gulf Coast region of the United States and disrupted gasoline refinery production.

The gaso line production at the Gulf Coast fell by 30 percent.
The price did not stay the same.

There are other factors that affect how much is supplied.

The price of inputs used in production, technology, expectations, and taxes are examples.

The law of 2 and the analysis of how these affect supply are related.

The number of inputs needed to produce a good can be reduced by advances in technology.

Explain the effect of the cost of production on profits and the effect on suppliers.

The entire supply curve is changed.

Explain what is likely to happen to subsidy to book producers when supply shifts.

The wage you earn doubles.

You've got it down if you came up with the answers: shift out to the right, shift in to the left, and no change.
It's time for a review if not.

Com puters is a good example.

Over the past 30 years technological changes have shifted the supply curve for computers out to the right.

Each supplier follows the law of supply, which states that when price rises, each supplier supplies more or at least as much as they did at a lower price.

Ann's supply curve is upward-sloping, meaning that price is related to quantity.

Charlie's and Barry's supply curves are similar.

The market supply curve is the same as the market demand curve was.

The three suppliers are quite similar to the three demanders.
If the price goes up to $4, Ann will increase her supply to four.

Barry supplies at $2 and at $6 he supplies five of the most he can.

There are only two units that Charlie has to supply.
He'll give that quantity at a price of $7, but higher prices won't get him to give any more.

All quantities are supplied at a price.

Movie suppliers include Ann, Barry, and Charlie.

The market supply curve is a horizontal sum of individual supply curves.

The information in columns 1 and 5 correspond to each point.

The market supply curve's upward slope is determined by two different sources, as the law of supply is based on two price rises, existing suppliers supply more and new suppliers enter the market.

Sometimes existing suppliers don't want to increase their quantity.
Suppliers respond to an increase in prices by increasing their supply, but a rise in price can bring in new suppliers.

A rise in teachers' salaries won't have an effect on the 2.

New suppliers enter the market at higher prices.

The introduction to the chapter was written by Thomas Carlyle, the English historian who dubbed economics "the dismal science".

I hope to convince you that parrots don't make good economists because supply and demand are important to economics.

They're mistaken about what matters about supply.

The quantity of oranges supplied isn't expected to be the same as the quantity demanded.

AINDER world, prices do change, often before the frost hits, as expec tations of the frost lead people to adjust.

Economics becomes interesting and relevant when you understand Six Things to Remember.

When price goes up, quantity goes down.

Consumers collude when prices are free to move up and down on the horizontal axis.

The quality of each unit is the same.

The supply curve assumes that the upward force of the hot air in the balloon constant is equilibrium.

In supply/demand analysis, equilibrium means that there are movements in the supply curve.

The ward pressure on price is shown by the effects of the upward pressure on price.

The quantity demanded is equal to the quantity supplied.

There is either excess supply or excess demand.

The price in the market will fall because all suppliers will be thinking the same thing.

Consumers will increase their demands.
The movement toward equilibrium is caused by both the supply and demand sides.

When there is excess supply, bargain hunters can get a deal.

The reverse is also true.

More consumers want the good than the suppliers do.
What is likely to go through demanders' minds?
They'll call long-lost friends who are sellers of that good and tell them it's good to talk to them and that they don't want to sell that.
Suppliers will be happy that so many of their old friends remember them, but they will also see the connection between excess demand and their friends' thoughtfulness.
They will likely raise their price to stop their phones from ringing all the time.
For excess supply, the reverse is true.
When there's excess supply, suppliers become friendly to potential con sumers.

When demand is greater than supply, prices go up.

When quantity is greater than demand, prices fall.

When quantity demanded equals quantity supplied, the market is in equilibrium because there is less pressure on prices to rise or fall.

People's tendencies to change prices are dependent on quantity supplied and quantity demanded.

The law of supply states that quantity supplied decreases as some suppliers leave the business.
"Well, at this low price, maybe I do want to buy" is the law of demand, as some people who originally weren't really interested in buy ing the good think.
When the price increases, the law of supply will increase and the law of demand will decrease.

Price changes when quantity supplied and quantity demanded are not equal.

If quantity demanded is the same as quantity supplied, the price will stay the same.

The force of the invisible hand is shown in Figure 8.

The price is $7 each.

The price is $3 each.

The price is $5.

When price is $7, quantity supplied is seven and quantity demanded is three.

Four is the excess supply.
Individual consumers can get what they want, but most suppliers can't sell everything they want, and they'll be stuck with movies that they want to rent.
Suppliers will tend to offer their goods at a lower price and demanders will try to get an even lower price.

Let's start from the other side.

The price is $3.

The situation is different now.
The quantity is three and the demand is seven.
Four is excess demand.
Suppliers are in a strong bargaining position while consumers can't get what they want.

The price is at its equilibrium at $5.

Consumers want to buy five and suppliers want to sell five.

The equilibrium price is where the supply and demand curves intersect.

There are two points about equilibrium.

Equilibrium isn't a state of the world.
It is the state of the world.
You use the framework to look at a characteristic of the model.

Let's see the force of the invisible hand.

There is upward pressure on price when there is excess demand.

There is downward pressure on price when there is excess supply.

Understanding these pressures is a must if you want to apply economics to reality.

A disequilibrium in another is caused by the quantity of movies supplied and demanded.

Say you're talking about a car that's going 100 miles an hour.
The car is moving relative to the ground.
It could be described as being in disequilibrium.
The cars could be modeled as being in equilibrium because their positions relative to each other aren't changing.

It isn't inherently good or bad to have equilibrium.

It's a state that's either good or bad.

A market in equilibrium is one in which people can buy the goods they want at the best price.

Other equilibria are not good.
Two countries are engaged in a nuclear war and both sides are destroyed.
There is nothing good about an equilibrium.

Understanding that equilibrium is a characteristic of the model, not the real world, is important in applying economic models to reality.

In the pre ceding description, I said equilibrium occurs when quantity supplied equals quantity demanded.
It's true in a model where economic forces are the only ones operating.

Political and social forces are operating in the real world.

The supply/demand equilibrium will likely be pushed away by these.

equilibrium is likely to exist where quantity supplied isn't equal to quantity demanded.
Farmers use political pressure to get higher prices for their crops.

Unemployment can be prevented from being accepted for work at lower wages because of social pressures.

Prices tend to rise when there is excess demand.

The price goes up when there is excess demand.

Existing firms try to limit new competition by lobbying Congress to pass restrictive regulations and by creating pricing strategies to scare off new entrants.

Renters organize to get the local government to set caps on rental prices.

If social and political forces were included in the analysis, they would put pressure on the dynamic forces of supply and demand.

If the market were only considered in reference to economic forces, the result would be an equilib rium with continual excess supply or excess demand.
Economic forces pushing toward a supply/ demand equilibrium would be stopped by social and political forces.

When trying to figure out what will happen to equilibrium price and quantity if either supply or demand shifts, supply and demand are most useful.

The supply and demand for movie rentals need to be considered again.

The quantity of movie rentals supplied will be 8 and the quantity demanded will be 10; excess demand of 2 exists.

I distinguished between an economic force and the supply and demand for children.

Children can be productive in farming communities.
They can work on a farm when they are six or seven years old.

Gary Becker of the University of Chicago was an economist who was good at this.

Farming societies will have more children per family.

The demand and supply of children are the same.

Developing countries that rely on Becker didn't argue that children should be bought, they just argued that farming often has three, four, or more children per fam sold.

He argued that economic considerations play a role.
Industrial societies tend to have fewer than two children involved in family decisions.

Along the supply curve and the demand curve, movement takes place.

The upward push on price decreases the gap between the quantity supplied and the quantity demanded.

The market is in equilibrium.

Increasing the quantity supplied from 8 to 9 and decreasing the quantity demanded from 10 to 9 bring about equilibrium.

Let's assume that some suppliers will no longer supply movies because they change what they do.

The quantity demanded is greater than the quantity supplied at the initial equilibrium price.
Two more movies are needed.

The upward pressure on price is caused by excess demand.

The price is pushed by an increase in the price of the small arrows.
The equilibrium quantity and price of hybrid cars are affected by the upward pressure on price.

The quantity demanded is equal to the quantity supplied.

The demand curve and the new supply curve have been adjusted.

You can try this exercise.

Even as demand increased, the price of com puters could have fallen dramatically.

When used correctly, supply and demand help us enormously.

I will introduce you to the limitations of the tools throughout the book, but I will also discuss an important one here.

Other things are assumed to be constant in supply/demand analysis.

One cannot directly apply supply/demand analysis if other things change.
It's impossible to hold other things constant when supply and demand are interdependent.
Let's use an example.
When determining the effect of ployment, we are considering the effect of a fall in the wage rate.
In supply/demand analysis, you would look at the effect that fall would have on price and quantity, in on workers' decisions to supply labor, and on business's decision to hire workers.
If you assume that other things will also have effects, which of the following markets would you choose?

There may be a reduction in demand for goods.

These ripple effects are important enough to make a difference.

There is no one answer to the question of which ripples should be included.

There is a lot of debate among economists about which effects to include.
When the goods are a small percentage of the entire economy, supply/demand analysis is appropriate.
The other-things-constant assumption will most likely hold that time.
The other-things-constant assump tion is likely not to hold true as soon as one starts analyzing goods that are a large percentage of the economy.

Consider a supplier who lowers his or her price.

The quantity of good demanded will increase if people sub stitute that good for other goods.

The substitution story is not allowed in the aggregate.

There are many examples.

An understanding of the fallacy of composition is relevant to Q10 Why is the fallacy of economics.

Whenever firms produce, they composition relevant for create income.

We have a separate macroeconomics because of this interdependence.

In macroeconomics, the other-things-constant assump tion central to micro economic supply/demand analysis often does not hold.

We separate macro analysis from It is to account for interdependency micro analysis.

There is an active debate about how complex structural models can be in modern eco- and aggregate demand decisions, because the supply and demand curves we use in micro are more complex than the curves we use in macro.

The fact that supply and demand may be interdependent does not mean that you can't use supply/demand analysis; it simply means that you must modify its results with the interdependency that you have kept.

Supply and demand analysis is a step in a good economic analysis, but you must remember that it is only a step.

I will be presenting examples of supply and demand throughout the book.

The intended purposes of this chapter have been served.
I gave you enough economic terminology and 96 introduction # Thinking Like an Economist to allow you to proceed to my more complicated examples.

I want to put the events around you into a supply/demand framework.

New insights into the events that shape our lives will be given by doing that.
You will have made an important step towards understanding the economic way of thinking if you incorporate the supply/demand framework into your way of looking at the world.

When quantity supplied equals quantity demanded, demanded rises as price falls, other things prices have no tendency to change.

When quantity demanded is greater than quantity as price rises, other things are constant.

Shift factors are factors that affect supply and demand other than quantity demanded.

The quantity rises (falls) are shift factors of supply.

In the real world, you must add political and social demand to the supply curve.

The laws of supply and demand hold true because demanded equals quantity supplied.
To ignore them is to fall into the curves.

Determine the market demand.

Draw the market supply and demand curves.

The equilibrium price and quantity will be labeled.

The shift factor of demand can affect your health.

The demon demand curve is the effect of a change in price on the equilibrium price demand curve.

The law of supply needs to be stated.

Show your answer graphically.

Sales volume increases when states increase.

List four shift factors of supply and explain how each answer affects supply.

The market supply curve is from 13 to 13.

The impact of increased security individual supply curves is expected.

Show your answer graphically.

Show your answer graphically.

Assume that Argentina imposes a 20 percent tax on natural gas exports.

Show the likely effect of that tax on gas exports.

The tea crop is affected by bad weather.

A medical report says tea is bad for your health.

The price of natural gas is published.

There are long lines of tea in developing countries.

This tells you about the 18.

The winter wheat harvest will be 2 billion bushels if you show supply and demand.

Define the problem of composition.

How does it affect the jump?

The price of gasoline in the United States is about $2.50 per gallon.

It costs consumers in Italy about 24.
It is likely that "other things constant" will hold in $6 per gallon.

Questions from Alternative Perspectives 1.

How might central plan 4 be planned in a centrally planned economy?
In the late 19th century, Washington Gladden said, "He have learned the conditions under which supply and de who battles for the Christianization of society will find mand explain outcomes."
These conditions may not hold economics.

Do you think consumers make purchasing decisions?

Evaluate the statement.

There is a conflict between capitalism's ideology.

The study of choice is often referred to as economics.

Where are men and women economic literate?

The demand for housing increased in the early 2000s.

The government realized that it couldn't.

Mortgage rates increased in 2005.

In a period of increasing demand for housing, what would the effect of a 75 percent tax be?

In a city such as San Francisco, you can show your subdivisions using supply and demand curves.

Bill 5 was honored by the U.S. postal service.

People switch to buying other goods unchanged when the supply curve rises.

The supply of curve will decrease if there is a heavy frost in Florida.

The horizon tally is summed when you add two demand curves.

The price of gas is likely to increase.

The demand for hybrid cars is the most likely thing to stay the same, as is the price and the luxury boat markets, because each is a small percent increasing the quantity supplied.
There are factors that affect the world graph.

Material effects that are immaterial for micro issues can add up.