science

John Craig (economist)

John Craig (economist) 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 John Craig (economist) rather than just read about it. In short: John Craig of Glasgow was elected in 1818 to the Fellowship of the Royal Society of Edinburgh, from which he resigned about 1840. Otherwise, very little is known about his life.

Key takeaways

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

Reference excerpt

John Craig of Glasgow was elected in 1818 to the Fellowship of the Royal Society of Edinburgh, from which he resigned about 1840. Otherwise, very little is known about his life. Craig wrote the three-volume The Elements of Political Science (1814) and Remarks on Some Fundamental Doctrines in Political Economy (1821). He studied under John Millar (philosopher).

Bruce (1938) states that Craig "is continually on the verge of expressing the idea of marginal utility", became "the first exponent of the idea of the connection between utility and value", and "comes close to expressing the idea of consumers' surplus". Craig "not only pioneered in opposing the theories of his time, but laid the groundwork for the utility theory to follow."His outstanding contribution to the discussion of wages is his opposition to the theories of the classical school: first, their theory that wages are fixed by the standard of life; second, the theory that a tax on wages necessarily raises wages; and third, the doctrine that wages and profits must vary inversely to each other. Joseph Schumpeter (1954) states that Craig's Fundamental Doctrines was "a performance of considerable merit" and "a whole Marshall in nuce" (in a nutshell).

References

Worked examples

Example 1 — a first encounter with John Craig (economist)

Start with the simplest possible case. Write down what John Craig (economist) 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 John Craig (economist) 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 John Craig (economist) 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 John Craig (economist)

In research: John Craig (economist) 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 John Craig (economist) 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: John Craig (economist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 19th-century British economists, Economist stubs, Fellows of the Royal Society of Edinburgh, so understanding it makes those chapters shorter.
In everyday life: Look for John Craig (economist) 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 John Craig (economist) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what John Craig (economist) 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 John Craig (economist) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is John Craig (economist) in simple terms?

John Craig of Glasgow was elected in 1818 to the Fellowship of the Royal Society of Edinburgh, from which he resigned about 1840. Otherwise, very little is known about his life.

Why does John Craig (economist) 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 John Craig (economist)?

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 John Craig (economist).