science

Reference date (United States business cycles)

Reference date (United States business cycles) 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 Reference date (United States business cycles) rather than just read about it. In short: The reference dates of the United States' business cycles are determined by the Business Cycle Dating Committee of the National Bureau of Economic Research (NBER), which looks at various coincident indicators such as real GDP, real personal income, employment, and sales to make informative judgments on when to set the historical dates of the peaks and troughs of past business cycles. The NBER was founded in 1920, an…

Key takeaways

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

Reference excerpt

The reference dates of the United States' business cycles are determined by the Business Cycle Dating Committee of the National Bureau of Economic Research (NBER), which looks at various coincident indicators such as real GDP, real personal income, employment, and sales to make informative judgments on when to set the historical dates of the peaks and troughs of past business cycles. The NBER was founded in 1920, and the first business cycle dates published in 1929. The Economic Cycle Research Institute (ECRI), founded by Geoffrey H. Moore, who created the first index of leading economic indicators (LEI) in 1967, also determines historical international business cycle dates comparable to the NBER’s U.S. business cycle chronology.

See also Economic Cycle Research Institute

External links National Bureau of Economic Research (NBER) Economic Cycle Research Institute (ECRI)

Worked examples

Example 1 — a first encounter with Reference date (United States business cycles)

Start with the simplest possible case. Write down what Reference date (United States business cycles) 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 Reference date (United States business cycles) 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 Reference date (United States business cycles) 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 Reference date (United States business cycles)

In research: Reference date (United States business cycles) 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 Reference date (United States business cycles) 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: Reference date (United States business cycles) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Business cycles in the United States, Macroeconomics stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Reference date (United States business cycles) 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 Reference date (United States business cycles) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Reference date (United States business cycles) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Reference date (United States business cycles) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Reference date (United States business cycles) in simple terms?

Why does Reference date (United States business cycles) 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 Reference date (United States business cycles)?

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 Reference date (United States business cycles).