Chapter 2 — The Market It Sells Into: Economics for Business
The module's primary reading · ~30–40 minutes · Objective 1 (describe what a business is — profit, risk, and the not-for-profit contrast — its stakeholders, the factors of production, and the forces in its external environment, and explain how economic systems, supply and demand, market structures, and the economy's health indicators shape business decisions) · Read it first this week; the lecture, the slides, the tutorial, and the quiz all build on it.
In plain language
This week is about the market a business sells into and the economy around that market. Every country has an economic system (its answer to who owns the farms, factories, and shops, and who decides what gets made). Inside a market, the price of something settles where demand (how much buyers want at each price) meets supply (how much sellers offer at each price). Markets also differ in how many sellers compete, and the whole economy has a few health signs that every owner watches. You will use one strawberry stand's schedule to see how a price is set, and you will find the coffee cart's place among its rivals.
Why you already care about this
Think about the last time something you wanted sold out. Maybe it was concert tickets, a new game console, or the good tacos at a food truck before noon. Or think about a time the opposite happened: a store with racks of winter coats it could not move, marked down again and again. You have already watched a price try to find its level.
You have also felt the bigger economy, even if no one called it that. When prices at the grocery store climb, when a friend's employer cuts hours, or when a new tax shows up on a receipt, a force from far outside the store has reached into your wallet. Last week you named those forces with a PESTEL scan. This week you start to see how some of them work.
This chapter gives you three tools a business owner uses to read the market. The first is a short list of economic systems, compared as positions with their reasons rather than as a contest with a winner. The second is a supply-and-demand schedule, the table that shows where a price settles and what happens when it does not. The third is a set of four market structures, which tell an owner how much room there is to set a price at all. We close with the signs of the economy's health and who is in charge of each kind of policy.
By the end of this chapter you will be able to:
- compare market, command, socialist, and mixed economic systems by who owns resources and who decides what is produced, giving each one's strongest case;
- read a supply-and-demand schedule and find its equilibrium price and amount;
- find a shortage and a surplus on a schedule and say which way each pushes the price;
- tell a shift of demand from a movement along the schedule and find the new equilibrium;
- place a business in one of the four market structures;
- name the economy's health indicators and say who sets fiscal policy and who runs monetary policy.
Carry this line with you: a price change moves you along the schedule; a shift moves the whole schedule.
Where we are
- Already covered: Week 1, The Idea and Its Environment, defined a business, mapped its stakeholders, scanned its outside world with PESTEL, and built the coffee cart's first SWOT.
- This week: economic systems, supply and demand on one strawberry schedule, the four market structures, and the economy's health indicators with the two kinds of policy.
- How they connect: last week's scan named economic forces and competitors from the outside; this week explains how a market turns those forces into a price and how many rivals the cart really faces.
- Where we're going next: Week 3, From Idea to Plan: Entrepreneurship, Small Business & the Business Plan, turns the cart's idea into a written plan.
Week 1 gave you the habit this chapter leans on: some forces sit outside a business, and the business can only respond to them. Two of the coffee cart's threats from last week return here. Rising bean prices are a supply-and-demand story, and the chain café opening nearby is a question about market structure. If the words inside and outside feel shaky, reread the SWOT section of Chapter 1 before Section 2.
1. Compare economic systems: who owns, who decides
Picture a neighborhood bakery at five in the morning. The ovens are warming, and someone has to decide how many loaves to bake. Too few, and customers leave empty-handed. Too many, and bread goes stale on the shelf. Who makes that call?
The answer depends on the country the bakery sits in. Every society has to settle the same questions about its whole economy, and the pattern of its answers has a name.
An economic system is the way a society answers two questions about its economy: who owns the productive resources, and who decides what gets produced.
Economists usually compare four systems.
- A market economy is an economic system in which private individuals and businesses own the productive resources and prices are set by buyers and sellers.
- A command economy is an economic system in which central planners decide what gets produced, how much of it, and how resources are used. Historical communist states are the usual examples.
- Socialism is an economic system in which the government owns or closely directs key industries.
- A mixed economy is an economic system that combines private ownership and market prices with a government role in owning, directing, or regulating parts of the economy; nearly every country runs one.
Worked example — who decides the bakery's loaves? The bakery is illustrative. Ask the two questions under each system.
- Market economy: the owner owns the ovens and decides the number of loaves by watching what customers buy at the prices the bakery sets.
- Command economy: a central plan assigns the bakery its number of loaves and its price, and the bakery carries out the plan.
- Socialism: the government may own the flour mills and other key industries, so the bakery's main supply comes from a government-run source on government-set terms.
- Mixed economy: the owner still decides the loaves, but the government sets food-safety rules, collects taxes, and may buy bread for school meals.
In words: the same morning decision lands with a different decision-maker under each system, and in a mixed economy it is shared.
Each system has serious defenders and serious critics. A course in business does not pick the winner; it shows you the reasons on each side so you can weigh them yourself.
| System | Who owns resources | Who decides | Strongest case for it | Strongest case against it |
|---|---|---|---|---|
| Market | private owners | buyers and sellers, through prices | prices carry information from countless everyday choices and reward new ideas and careful use of resources | it can leave people without basics and ignore harms to others, such as pollution |
| Command | the state | central planners | it can steer resources fast toward goals the planners set, such as equal access to basics | planners lack the information prices carry, so shortages, waste, and little choice can follow |
| Socialism | government, for key industries | government, for those industries | key industries can be run for public need rather than for profit | weaker rewards for new ideas and careful cost control, and power gathered in government hands |
| Mixed | private owners and government | markets, with government rules and programs | it can keep the strengths of markets while government covers what markets miss | each side argues the mix is wrong, with too much government or too little |
The classic case for markets is Adam Smith's An Inquiry into the Nature and Causes of the Wealth of Nations, published in 1776. You will hear Smith (1776) named often. This course names the book but does not quote it, because famous lines are often misquoted.
Honesty note: these four are a classroom model, not four boxes that real countries fit neatly. The live argument in most countries is not "markets or planning" but "how much government, and where." That argument is about judgment as well as facts, so expect thoughtful people to land in different places.
Misconception check. Students often think each real country fits one pure system, so they ask which box a country "is." It is a tempting shortcut, because the four names sound like four separate places. But nearly every country actually runs a mixed economy, and countries differ in the mix. The better question is how a country divides ownership and decisions between private hands and government.
Pause and try this. Choose one: (a) name one service near you that government provides and one that private businesses provide, and say who decides how much of each there is; or (b) pick one row of the table and write the strongest case for the side you find less convincing.
Memory hook: two questions sort every system: who owns, and who decides.
2. Read the schedule: where buyers and sellers meet
Picture a strawberry stand at a summer farmers' market. Early in the morning, the growers set a price per pint. If the price is high, fewer shoppers buy. If it is low, more shoppers buy, but growers would rather bring their berries to a market that pays more. Somewhere in between, the two sides meet.
A table can show both sides at once. It lists several prices and, beside each, how many pints buyers want and how many pints sellers offer. Each side of that table has a name.
- Demand is the amount of a good that buyers want to purchase at each possible price, read as a whole schedule of prices and amounts.
- Supply is the amount of a good that sellers want to offer for sale at each possible price, read as a whole schedule of prices and amounts.
Read across the rows and two patterns appear. As the price rises, buyers want fewer pints. As the price rises, sellers offer more pints. At one price, the two amounts match.
Equilibrium is the price at which the amount buyers want to purchase matches the amount sellers want to sell.
Worked example — the strawberry schedule. The farmers'-market strawberry schedule is illustrative, constructed for this course and not real data. Prices are in dollars a pint, and amounts are pints on one market day.
| Price (dollars a pint) | Pints buyers want | Pints sellers offer |
|---|---|---|
| 2 | 700 | 100 |
| 3 | 600 | 200 |
| 4 | 500 | 300 |
| 5 | 400 | 400 |
| 6 | 300 | 500 |
| 7 | 200 | 600 |
- Read the buyers' column from top to bottom: 700, 600, 500, 400, 300, and 200 pints. Buyers want less at higher prices.
- Read the sellers' column: 100, 200, 300, 400, 500, and 600 pints. Sellers offer more at higher prices.
- Find the row where the two match. At 5 dollars a pint, buyers want 400 pints and sellers offer 400 pints; 400 = 400.
- So the equilibrium is 5 dollars and 400 pints.
In words: on a normal market day, strawberries settle at 5 dollars a pint, and 400 pints change hands.
Honesty note: the schedule is a classroom model. It assumes one kind of strawberry, many shoppers and growers, and nothing else changing while the price moves. Real markets are messier, but the model shows the direction prices tend to move, which is what an owner needs.
Misconception check. Students often think the sellers set the price, since they are the ones who write it on the sign. That is tempting, because the sign is the first thing you see. But a grower who prices above 5 dollars watches pints go unsold, and one who prices below it sells out early while shoppers are still in line. The price on the sign tends to move toward the price where buyers and sellers agree.
Pause and try this. Choose one: (a) think of something you bought that seemed too expensive and say whether you bought less of it because of the price; or (b) think of a job you have held and name something the business would have offered more of if customers paid more.
Memory hook: buyers want less as the price climbs; sellers offer more.
3. Find the shortage and the surplus
Now picture the same strawberry stand with the wrong price on its sign. At 4 dollars a pint, the line is long and the berries run out before noon. At 6 dollars, the line is short and flats of berries sit in the sun all afternoon.
Each of those days has a name.
- A shortage is the gap that opens at a price below equilibrium, when buyers want more than sellers offer; it tends to push the price up.
- A surplus is, in a market, the gap that opens at a price above equilibrium, when sellers offer more than buyers want; it tends to push the price down, and it is a different idea from the money a not-for-profit has left over after expenses.
Written as one-line formulas, shortage = amount buyers want − amount sellers offer, and surplus = amount sellers offer − amount buyers want.
Worked example — two wrong prices on the same schedule. The schedule is the illustrative one from Section 2.
- At 4 dollars a pint, below equilibrium, buyers want 500 pints and sellers offer 300 pints.
- Shortage = 500 − 300 = 200 pints.
- At 6 dollars a pint, above equilibrium, sellers offer 500 pints and buyers want 300 pints.
- Surplus = 500 − 300 = 200 pints.
In words: a price one dollar too low leaves 200 pints' worth of shoppers without berries, and a price one dollar too high leaves 200 pints of berries without shoppers.
What happens next? Shoppers who missed out at 4 dollars would pay more, so growers can raise the price. Growers stuck with extra pints at 6 dollars would rather cut the price than throw berries away. Either way, the price tends to move back toward 5 dollars.
A word on the word surplus. In Week 1, a not-for-profit's surplus was money left over after its expenses. In a market, a surplus is a pile of goods nobody wants at the current price. Same word, two ideas; read the sentence around it.
Misconception check. Students often think a shortage means "the sellers ran out" because of bad luck or poor planning. That is tempting, because an empty table is what you see. But in this model a shortage is about the price: at 4 dollars, buyers want more than sellers offer, and the gap closes as the price rises. The cure is to ask where the price sits compared with equilibrium.
In practice (your tools). You can find every gap on the schedule in any free spreadsheet, such as Google Sheets. Type the prices in cells A2 through A7, the pints buyers want in B2 through B7, and the pints sellers offer in C2 through C7. In cell D2 type =B2-C2 and fill it down to D7. A positive number is a shortage, a negative number is a surplus, and a zero marks the equilibrium row.
Memory hook: below equilibrium, a line; above it, a pile.
4. Shift demand: a change at every price
Now picture the farmers' market on the weekend of a summer festival. Crowds of visitors stroll past the stand. At every price on the sign, more people want strawberries than on a normal day. Nothing about the berries changed; the crowd did.
That kind of change is different from a price change, and the difference matters.
A shift of demand is a change in the amount buyers want at every price at once, caused by something other than the good's own price, which moves the market to a new equilibrium.
When only the price changes, buyers slide along the same schedule: a higher price means a smaller amount wanted, on the same row-by-row pattern. When something else changes, such as a festival crowd, the whole buyers' column changes.
Worked example — the festival shift. The festival is part of the illustrative strawberry schedule. It adds 200 pints of demand at every price.
- Add 200 to each amount buyers want: 700 + 200 = 900, 600 + 200 = 800, 500 + 200 = 700, 400 + 200 = 600, 300 + 200 = 500, and 200 + 200 = 400 pints.
- Check the old price first. At 5 dollars, buyers now want 600 pints and sellers still offer 400 pints, so shortage = 600 − 400 = 200 pints. The old price no longer clears the market.
- Find the new match. At 6 dollars a pint, buyers now want 500 pints and sellers offer 500 pints; 500 = 500.
- So the new equilibrium is 6 dollars and 500 pints.
- Compare: the price rose 6 − 5 = 1 dollar a pint, and the amount sold rose 500 − 400 = 100 pints.
| Price (dollars a pint) | Buyers want, normal day | Buyers want, festival | Sellers offer |
|---|---|---|---|
| 2 | 700 | 900 | 100 |
| 3 | 600 | 800 | 200 |
| 4 | 500 | 700 | 300 |
| 5 | 400 | 600 | 400 |
| 6 | 300 | 500 | 500 |
| 7 | 200 | 400 | 600 |
In words: before the festival the market settles at 5 dollars and 400 pints; the festival raises demand at every price, so both the price and the amount sold go up, to 6 dollars and 500 pints.
Notice what did not change: the sellers' column. The growers offer exactly what they offered before at each price. They sell more because the price rose, which moved them along their own column.
Misconception check. Students often think a higher price means "more demand," so they read the festival's 6-dollar price as the cause of the extra buying. That reverses the story. A higher price on its own moves buyers along the same schedule to a smaller amount. Here the festival changed demand at every price, and the higher price was the result. The cure: ask whether one price changed or the whole column did.
In practice (your tools). In the same spreadsheet, type =B2+200 in cell E2 and fill it down to E7 to build the festival column. Then type =E2-C2 in cell F2 and fill it down. The row where column F shows zero is the new equilibrium, 6 dollars and 500 pints.
Memory hook: a price change slides along the column; a shift rewrites it.
5. Place the business: four market structures
Think about four places that sell something: a wheat farm, a nail salon, a wireless phone carrier, and a city water utility. All four are businesses or public services, but they face very different markets. The wheat farmer cannot charge a cent above the going price. The water utility has no rival at all.
Economists sort those differences with one idea.
A market structure is a way of sorting markets by how many sellers there are, how alike their products are, and how easily a new seller can enter.
There are four structures, running from the most sellers to one.
- Perfect competition is a market structure with very many sellers of an identical product, none of whom can set the price.
- Monopolistic competition is a market structure with many sellers of slightly different products and easy entry for new sellers.
- An oligopoly is a market structure with a handful of large sellers and steep barriers that keep new sellers out.
- A monopoly is a market structure with a single seller protected by high barriers to entry.
Worked example — placing four businesses, then the coffee cart. Every example is illustrative.
| Business | Number of sellers | Product | Entry for a new seller | Market structure |
|---|---|---|---|---|
| a wheat farm | very many | identical wheat | easy | perfect competition |
| a nail salon | many | each salon a little different | easy | monopolistic competition |
| a wireless carrier | a handful of large ones | similar plans | steep barriers, such as building networks | oligopoly |
| a city water utility | one | water through the city's pipes | blocked | monopoly |
Now place the running venture. The illustrative coffee cart faces many sellers of coffee: other carts, cafés, and the chain café opening nearby. Each drink is a little different, with its own recipe, location, and service. A new cart can enter with modest equipment and a permit.
- Many sellers? Yes.
- Products a little different? Yes.
- Easy entry? Yes.
- So the coffee cart sits in monopolistic competition.
In words: the cart has a little room to set its own price because its drinks are its own, but not much, because a customer can walk to a rival in minutes.
Where a market drifts toward monopoly, the law steps in. An antitrust law is a federal law that polices monopoly and limits on competition; the Sherman Act (1890) is the first of the three core federal antitrust laws. The other two, the Federal Trade Commission Act and the Clayton Act, both date from 1914. This course names them as general education only, not as legal advice for any business.
Misconception check. Students often think monopolistic competition is "a kind of monopoly," because the first word sounds like monopoly. It is the opposite end of the scale from a single seller. The coffee cart has many rivals and no protection from new ones. The word monopolistic refers only to the small amount of pricing room each seller gets from its slightly different product.
Pause and try this. Choose one: (a) pick a business you buy from often and decide which of the four structures it sits in, giving one reason; or (b) pick a place you have worked and name its closest rival and what makes their products a little different.
Memory hook: count the sellers, compare the products, check the door.
6. Name the economy's health signs and who steers
Picture a family-run hardware store. When the economy is growing, people start building decks and fixing roofs, and the store sells more lumber. When a big local employer cuts jobs, fewer families take on projects. When prices across the economy rise fast, the store's own costs for nails and paint jump, and planning gets harder.
Those three worries line up with the three signs economists watch to judge the economy's health.
- Growth. The usual measure is GDP, gross domestic product: the total value of the final goods and services an economy produces in a year, the usual measure of economic growth. This course names GDP and never asks you to compute it.
- Employment. How many people who want work have it.
- Price stability. Whether prices across the economy hold steady or climb quickly.
Worked example — reading the signs at the hardware store. The store and its news are illustrative.
- A report says the economy grew last year. Sign: growth. Likely effect: more building projects, more sales.
- A large local employer announces layoffs. Sign: employment. Likely effect: fewer families take on projects.
- Prices across the economy are climbing quickly. Sign: price stability. Likely effect: the store's costs rise, and it must decide whether to raise its own prices.
In words: none of the three signs is the store's own doing, but each one changes what the owner should expect next season.
Two kinds of government policy try to steady those signs, and different people run them.
- Fiscal policy is government spending and taxation, set in the United States by Congress and the President.
- Monetary policy is policy run by the Federal Reserve toward the goals Congress assigned it, maximum employment and stable prices.
So when you read that Congress passed a tax change or a new spending program, that is fiscal policy. When you read about a Federal Reserve decision, that is monetary policy. How the Federal Reserve does its work is a topic for later in the course.
Caveat: whether a given tax change, spending plan, or Federal Reserve move is wise is argued terrain. This chapter names who holds each lever and stops there; it offers no verdict on any policy.
Misconception check. Students often think the Federal Reserve sets taxes and government spending, because it is the economic agency they hear about most. That swaps the two kinds of policy. Taxes and spending are fiscal policy, set by Congress and the President. The Federal Reserve runs monetary policy. The cure: ask whether the news is about the government's budget or about the Federal Reserve.
Memory hook: fiscal is the budget; monetary is the Fed.
Key terms
- economic system — The way a society answers two questions about its economy: who owns the productive resources, and who decides what gets produced. (first used: 1. Compare economic systems: who owns, who decides)
- market economy — An economic system in which private individuals and businesses own the productive resources and prices are set by buyers and sellers. (first used: 1. Compare economic systems: who owns, who decides)
- command economy — An economic system in which central planners decide what gets produced, how much of it, and how resources are used. (first used: 1. Compare economic systems: who owns, who decides)
- socialism — An economic system in which the government owns or closely directs key industries. (first used: 1. Compare economic systems: who owns, who decides)
- mixed economy — An economic system that combines private ownership and market prices with a government role in owning, directing, or regulating parts of the economy; nearly every country runs one. (first used: 1. Compare economic systems: who owns, who decides)
- demand — The amount of a good that buyers want to purchase at each possible price, read as a whole schedule of prices and amounts. (first used: 2. Read the schedule: where buyers and sellers meet)
- supply — The amount of a good that sellers want to offer for sale at each possible price, read as a whole schedule of prices and amounts. (first used: 2. Read the schedule: where buyers and sellers meet)
- equilibrium — The price at which the amount buyers want to purchase matches the amount sellers want to sell. (first used: 2. Read the schedule: where buyers and sellers meet)
- shortage — The gap that opens at a price below equilibrium, when buyers want more than sellers offer; it tends to push the price up. (first used: 3. Find the shortage and the surplus)
- surplus — In a market, the gap that opens at a price above equilibrium, when sellers offer more than buyers want; it tends to push the price down, and it is a different idea from the money a not-for-profit has left over after expenses. (first used: 3. Find the shortage and the surplus)
- shift of demand — A change in the amount buyers want at every price at once, caused by something other than the good's own price, which moves the market to a new equilibrium. (first used: 4. Shift demand: a change at every price)
- market structure — A way of sorting markets by how many sellers there are, how alike their products are, and how easily a new seller can enter. (first used: 5. Place the business: four market structures)
- perfect competition — A market structure with very many sellers of an identical product, none of whom can set the price. (first used: 5. Place the business: four market structures)
- monopolistic competition — A market structure with many sellers of slightly different products and easy entry for new sellers. (first used: 5. Place the business: four market structures)
- oligopoly — A market structure with a handful of large sellers and steep barriers that keep new sellers out. (first used: 5. Place the business: four market structures)
- monopoly — A market structure with a single seller protected by high barriers to entry. (first used: 5. Place the business: four market structures)
- antitrust law — A federal law that polices monopoly and limits on competition; the Sherman Act (1890) is the first of the three core federal antitrust laws. (first used: 5. Place the business: four market structures)
- GDP — Gross domestic product: the total value of the final goods and services an economy produces in a year, the usual measure of economic growth. (first used: 6. Name the economy's health signs and who steers)
- fiscal policy — Government spending and taxation, set in the United States by Congress and the President. (first used: 6. Name the economy's health signs and who steers)
- monetary policy — Policy run by the Federal Reserve toward the goals Congress assigned it, maximum employment and stable prices. (first used: 6. Name the economy's health signs and who steers)
Summary
- Economic systems differ on who owns resources and who decides what is produced.
- Market, command, socialist, and mixed systems each have a strong case and strong critics; nearly every country runs a mixed economy.
- Equilibrium is the price where the amount buyers want matches the amount sellers offer.
- Below equilibrium there is a shortage; above it there is a surplus.
- A price change moves buyers along the schedule; a shift of demand changes the amount wanted at every price.
- The four market structures run from perfect competition through monopolistic competition and oligopoly to monopoly.
- The coffee cart sits in monopolistic competition, and the Sherman Act (1890) polices monopoly.
- Growth (measured by GDP), employment, and price stability are the economy's health signs.
- Congress and the President set fiscal policy; the Federal Reserve runs monetary policy.
Check your understanding
Work these before looking at the answers — they are ungraded, and the answers (with reasoning) are at the bottom of the page.
- At a city's monthly secondhand-bike swap (an illustrative example), at 60, 80, 100, 120, and 140 dollars a bike, buyers want 50, 40, 30, 20, and 10 bikes, and sellers offer 10, 20, 30, 40, and 50 bikes. Find the equilibrium, and find the gap at 80 dollars and say whether it is a shortage or a surplus.
- A friend says, "Secondhand bikes cost more this month, so demand for them went up." Using the swap schedule from item 1, explain what is wrong with that sentence and what a real shift of demand would look like.
- Place each illustrative business in a market structure: the only ferry service to a small island; a dairy farm selling milk at the going price; five barbershops on one avenue; three large airlines flying the same route.
- A news story reports two events: Congress and the President agree to cut a tax, and the Federal Reserve announces a policy decision. Name the kind of policy in each event and say who wields it.
Answers (worked reasoning — read after attempting)
- Find the row where the amounts match. At 100 dollars, buyers want 30 bikes and sellers offer 30 bikes; 30 = 30, so the equilibrium is 100 dollars and 30 bikes. At 80 dollars, buyers want 40 and sellers offer 20, so 40 − 20 = 20 bikes. Buyers want more than sellers offer at a price below equilibrium, so it is a shortage of 20 bikes, and the price tends to rise.
- A higher price on its own does not raise demand. If the price climbs from 100 to 120 dollars, buyers slide along the same schedule and want fewer bikes, 20 instead of 30. A real shift of demand would change the amount wanted at every price at once, for example if a new bike lane opened and buyers wanted 20 more bikes at every price, so the whole buyers' column would rise.
- The ferry is a monopoly: one seller, and a rival would have to build its own service. The dairy farm is in perfect competition: very many sellers of an identical product, so it takes the going price. The barbershops are in monopolistic competition: many sellers, each a little different, with easy entry. The three airlines form an oligopoly: a handful of large sellers with steep barriers, such as buying planes. Notice the trap: the barbershops are not "a kind of monopoly."
- The tax cut is fiscal policy, because it changes taxes; Congress and the President set it. The Federal Reserve's decision is monetary policy; the Federal Reserve runs it. The trap is giving the tax cut to the Federal Reserve.
Next up in this module: the Readings & Resources page, the lecture tutorial, the practice set, and the quiz — and next week the five forces model shows how rivals, buyers, and suppliers shape the coffee cart's industry.
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