Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →The five commonly taught non-price determinants of demand are income, tastes and preferences, prices of related goods, expectations, and the number and composition of buyers. They shift the entire demand curve. A change in a product’s own price instead changes quantity demanded, shown as movement along the existing curve.
What are the five determinants of demand?
In economics, demand is buyers’ willingness and ability to purchase a good or service at different prices. The five determinants below can change how much buyers want at every price, shifting the demand curve.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
Principles of Economics | $270.79 | Buy on Amazon |
| 2 |
|
Basic Economics: A Common Sense Guide to the Economy | $25.49 | Buy on Amazon |
| 3 |
|
Economics For Dummies: Book + Chapter Quizzes Online | $17.49 | Buy on Amazon |
| 4 |
|
Principles of Economics | $177.99 | Buy on Amazon |
| 5 |
|
Understanding Economics, Student Edition (ECONOMICS PRINCIPLES & PRACTIC) | $46.61 | Buy on Amazon |
1. Income
For a normal good, higher income increases demand: at each price, buyers are willing and able to purchase more. Restaurant meals may be a normal good, so rising household incomes can shift their demand curve to the right.
For an inferior good, higher income can reduce demand as buyers switch to alternatives they prefer. Canned food may be inferior in a particular market, for example, but whether a good is normal or inferior depends on the buyers and market being considered.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →#1 Best Overall
2. Tastes and preferences
Changes in fashion, advertising, perceived quality, or popularity can increase or decrease demand. If a health campaign makes cycling more popular, demand for bicycles can shift right: buyers want more bicycles at every price.
3. Prices of related goods
Related goods can be substitutes or complements. A substitute can serve a similar purpose; a complement is commonly used together with the good in question.
Rank #2
- Substitutes: If the price of tea rises, some consumers may switch to coffee. Demand for coffee then increases at each coffee price.
- Complements: If gasoline becomes more expensive, demand for sport-utility vehicles may fall because the goods are used together. Other examples of complements include breakfast cereal and milk, notebooks and pens or pencils, and golf balls and golf clubs.
In general, a higher substitute price tends to raise demand for the focal good, while a higher complement price tends to lower it.
4. Expectations
What buyers expect about future prices, income, availability, or events can affect what they buy now. If consumers expect coffee prices to rise next month, they may stock up today, increasing current demand. If they expect prices to fall, they may postpone a purchase.
Rank #3
5. Number and composition of buyers
Market demand depends on who is buying as well as how many buyers there are. An influx of driving-age residents may raise demand for car insurance. A change in the age composition of households can reduce demand for diapers. These changes affect the pool of potential buyers and the needs they bring to the market.
What is the demand formula?
A general demand function is Qd = f(P, Y, Pr, T, E, N). It expresses quantity demanded as a function of several factors:
Rank #4
| Symbol | Meaning |
|---|---|
| Qd | Quantity demanded |
| P | The good’s own price |
| Y | Consumer income |
| Pr | Prices of related goods |
| T | Tastes and preferences |
| E | Expectations |
| N | Number and composition of buyers |
The notation is a compact way to show that several variables jointly influence quantity demanded. It is not a single universal equation for calculating demand: the exact algebraic form depends on the market and the economic model.
What is the difference between demand and quantity demanded?
Demand describes the relationship between a good’s price and the quantities buyers are willing and able to purchase, holding other relevant factors constant. Quantity demanded is the amount buyers choose at one particular price.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
A change in the good’s own price causes movement along its demand curve. A change in one of the five non-price determinants shifts the curve, changing the quantity buyers would demand at each price. OpenStax explains this distinction in its discussion of shifts in demand and supply.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to tell whether demand shifts or quantity demanded changes
- If the product’s own price changes and other conditions stay the same, describe a change in quantity demanded: movement along the curve.
- If income, preferences, related-good prices, expectations, or the buyer pool changes, describe a change in demand: the curve shifts.
- A rightward shift means buyers demand more at every price; a leftward shift means they demand less at every price.
Introductory economics courses do not always use “five determinants” in exactly the same way. Some lists count the good’s own price as a determinant. In the convention used here, own price is kept separate because it changes quantity demanded along a curve; the five listed factors are the non-price determinants that shift it.
Examples at a glance
| Change | Effect on demand | Why |
|---|---|---|
| Income rises; restaurant meals are normal goods | Rightward shift | Buyers can afford more at each price. |
| Income rises; canned food is inferior in the market | Leftward shift | Some buyers trade up to preferred alternatives. |
| Cycling becomes more popular | Rightward shift for bicycles | Tastes and preferences change. |
| Tea prices rise | Rightward shift for coffee | Some consumers switch to a substitute. |
| Gasoline prices rise | Potential leftward shift for sport-utility vehicles | Buyers may want fewer goods used together. |
| Consumers expect coffee prices to rise | Rightward shift in current coffee demand | Some buyers stock up before the expected increase. |
| More driving-age residents enter a market | Rightward shift for car insurance | The potential buyer pool grows. |
Sources
For the standard shift rules and examples, see OpenStax Principles of Economics 3e, “Shifts in Demand and Supply for Goods and Services”. Ankara University course material presents the demand relationship as a function of price, income, related-good prices, tastes, expectations, and the number of buyers.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
