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Saving

Saving is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Saving rather than just read about it. In short: Saving is income not spent, or deferred consumption. In economics, a broader definition is any income not used for immediate consumption.

Saving — main illustration
Saving — illustration

Key takeaways

  • Saving belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Saving to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Saving from memory before moving on to harder problems.

Reference excerpt

Saving is income not spent, or deferred consumption. In economics, a broader definition is any income not used for immediate consumption. Saving also involves reducing expenditures, such as recurring costs. Methods of saving include putting money in, for example, a savings account, a pension account, an investment fund, or kept as cash. In terms of personal finance, saving generally specifies low-risk preservation of money, as in a deposit account, versus investment, wherein risk is a lot higher. Saving does not automatically include interest. Saving differs from savings. The former refers to the act of not consuming one's assets, whereas the latter refers to either multiple opportunities to reduce costs; or one's assets in the form of cash. Saving refers to an activity occurring over time, a flow variable, whereas savings refers to something that exists at any one time, a stock variable. This distinction is often misunderstood, and even professional economists and investment professionals will often refer to "saving" as "savings". In different contexts there can be subtle differences in what counts as saving. For example, the part of a person's income that is spent on mortgage loan principal repayments is not spent on present consumption and is therefore saving by the above definition, even though people do not always think of repaying a loan as saving. However, in the U.S. measurement of the numbers behind its gross national product (i.e., the National Income and Product Accounts), personal interest payments are not treated as "saving" unless the institutions and people who receive them save them. Saving is closely related to physical investment, in that the former provides a source of funds for the latter. By not using income to buy consumer goods and services, it is possible for resources to instead be invested by being used to produce fixed capital, such as factories and machinery. Saving can therefore be vital to increase the amount of fixed capital available, which contributes to economic growth. However, increased saving does not always correspond to increased investment. If savings are not deposited into a financial intermediary such as a bank, there is no chance for those savings to be recycled as investment by business. This means that saving may increase without increasing investment, possibly causing a short-fall of demand (a pile-up of inventories, a cut-back of production, employment, and income, and thus a recession) rather than to economic growth. In the short term, if saving falls below investment, it can lead to a growth of aggregate demand and an economic boom. In the long term if saving falls below investment it eventually reduces investment and detracts from future growth. Future growth is made possible by foregoing present consumption to increase investment. However, savings not deposited into a financial intermediary amount to a loan (interest-free) to the government or central bank, who can recycle this loan. In a primitive agricultural economy, savings might take the form of holding back the best of the corn harvest as seed corn for the next planting season. If the whole crop were consumed the economy would convert to hunting and gathering the next season.

Interest rates Classical economics posited that interest rates would adjust to equate saving and investment, avoiding a pile-up of inventories (general overproduction). A rise in saving would cause a fall in interest rates, stimulating investment, hence always investment would equal saving. But John Maynard Keynes argued that neither saving nor investment was very responsive to interest rates (i.e. that both were interest-inelastic) so that large interest rate changes were needed to re-equate them after one changed. Furthermore, it was the demand for and supplies of stocks of money that determined interest rates in the short run. Thus, saving could exceed investment for significant amounts of time, causing a general glut and a recession.

Saving in personal finance Within personal finance, the act of saving corresponds to nominal preservation of money for future use. A savings account paying interest is typically used to hold money for future needs, i.e. an emergency fund, to make a capital purchase (car, house, vacation, etc.) or to give to someone else (children, tax bill, etc.). Cash savings accounts are considered to have minimal risk. In the United States, all banks are required to have deposit insurance, typically issued by the Federal Deposit Insurance Corporation or FDIC. In extreme cases, a bank failure can cause deposits to be lost as it happened at the start of the Great Depression. The FDIC has prevented that from happening ever since. Within personal finance, money used to purchase stocks, put in an investment fund or used to buy any asset where there is an element of capital risk is deemed an investment. This distinction is important as the investment risk can cause a capital loss when an investment is realized, unlike cash saving(s). In many instances the terms saving and investment are used interchangeably. For example, many deposit accounts are labeled as investment accounts by banks for marketing purposes. As a rule of thumb, if money is "invested" in cash, then it is savings. If money is used to purchase some asset that is hoped to increase in value over time, but that may fluctuate in market value, then it is an investment.

Saving in economics

In economics, saving is defined as after-tax income minus consumption. The fraction of income saved is called the average propensity to save, while the fraction of an increment to income that is saved is called the marginal propensity to save. The rate of saving is directly affected by the general level of interest rates. The capital markets equilibrate the sum of (personal) saving, government surpluses, and net exports to physical investment.

See also

Notes

References Dell'Amore, Giordano (1983). "Household Propensity to Save", in Arnaldo Mauri (ed.), Mobilization of Household Savings, a Tool for Development, Finafrica, Milan. Modigliani, Franco (1988). "The Role of Intergenerational Transfers and the Life-cycle Saving in the Accumulation of Wealth", Journal of Economic Perspectives, n. 2, 1988.

… excerpt ends here. Continue reading the full article.

Illustrations

Saving illustration
Saving: .mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Personal saving as a percentage of disposable personal income in the US (1960 - 2022) - The spike in 2020 is attributable to the effects of the COVID-19 pandemic
.mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Personal saving as a percentage of disposable personal income in the US (1960 - 2022) - The spike in 2020 is attributable to the effects of the COVID-19 pandemic

Worked examples

Example 1 — a first encounter with Saving

Start with the simplest possible case. Write down what Saving claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Saving before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Saving ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Saving

In research
Saving appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Saving in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Saving is common in secondary-school and first-year university syllabi. It links to neighbouring topics Consumer theory, Intertemporal economics, Personal finance, so understanding it makes those chapters shorter.
In everyday life
Look for Saving outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Saving in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Saving means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Saving out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Saving in simple terms?

Saving is income not spent, or deferred consumption. In economics, a broader definition is any income not used for immediate consumption.

Why does Saving matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Saving?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Saving.

Tags

  • Consumer theory
  • Intertemporal economics
  • Personal finance

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