In the circular flow model, households send money to firms through consumption and taxes, while firms send money back as wages and profits.
The part of household income that is not spent on consumption is called savings.
Understanding how savings behave is key for A‑Level economics exams.
Think of the economy as a giant pizza 🍕.
• Households (the pizza lovers) buy goods and services from firms.
• Firms (the pizza chefs) pay wages and produce goods.
The money moves back and forth, creating a continuous loop.
The amount of money that households keep instead of spending is their savings.
The savings function shows how total savings (S) depend on income (Y) and taxes (T).
It is written as:
\$S = a + b(Y - T)\$
• Autonomous Savings are like a fixed allowance you keep for emergencies – it stays the same even if your pocket money changes.
• Induced Savings rise when you have more disposable income, just like you might save more when you get a bigger birthday gift.
| Component | Definition | Example |
|---|---|---|
| Autonomous Savings (a) | Savings that occur regardless of income level. | Saving £50 each month for a future trip. |
| Induced Savings (b(Y - T)) | Savings that vary with disposable income. | If your disposable income rises, you save more. |
| Total Savings (S) | Sum of autonomous and induced. | \$S = a + b(Y - T)\$ |
Suppose:
\$S = 200 + 0.2(2000 - 500) = 200 + 0.2(1500) = 200 + 300 = 500\$
??
Key Points:
• Autonomous savings is a fixed amount (the “a” term).
• Induced savings depends on disposable income (the “b(Y‑T)” term).
• In exam questions, look for words like “fixed” or “independent” to spot autonomous savings.
• Practice plugging numbers into the equation to avoid algebraic mistakes.
Answers: 1️⃣ Autonomous savings. 2️⃣ \$0.25(3000-800)=0.25(2200)=550\$.