Economics · Ch 1 — Economics: An Introduction
Meaning and Definitions of Economics
Meaning and Definitions of Economics
Economics is the social science that studies how individuals, households, firms and nations make choices about using scarce resources to satisfy their many wants. The word itself traces back to the Greek oikonomia — oikos (household) plus nomos (managing) — literally, 'management of a household.' Over roughly two centuries, economists have looked at this same subject from very different angles, and each angle produced its own definition. The Gujarat board Std 11 Economics syllabus opens with four such definitions, each tied to a particular economist and a particular way of seeing the discipline.
No single definition captures economics completely on its own — each highlights one dimension (wealth, welfare, scarcity, or growth) while understating the others. Reading all four together, in the order they were proposed, gives a far more rounded picture of what economics actually studies than any one of them alone.
Adam Smith, in his 1776 book An Inquiry into the Nature and Causes of the Wealth of Nations, treated economics as the science of wealth. He studied how a nation produces, accumulates and distributes wealth among its people, and why some nations grow wealthier than others. This is why Smith is called the 'Father of Economics.' Later economists criticised the view for treating wealth — rather than human welfare — as economics' central concern, and for seeming to reduce the subject to what critics called a 'gospel of mammon' (a science only of money-making).
Alfred Marshall, in Principles of Economics (1890), redefined economics as 'a study of mankind in the ordinary business of life' — how people earn and use income in ways that promote material well-being. Marshall shifted the emphasis from wealth for its own sake to wealth as a means to human welfare, and made 'man' rather than 'wealth' the centre of study. Lionel Robbins later objected that this wrongly confined economics to only the 'material' and 'welfare-promoting' parts of human activity, leaving out activities (such as the economics of war, or of a good considered harmful) that are still clearly economic in nature even though they do not raise welfare.
Lionel Robbins, in An Essay on the Nature and Significance of Economic Science (1932), defined economics as 'the science which studies human behaviour as a relationship between ends and scarce means which have alternative uses.' This drops any reference to wealth or welfare and instead places scarcity and choice at the centre: human wants are unlimited, but the means available — time, money, land, labour — are limited and can be used for more than one purpose. Every economic decision, in Robbins' view, is essentially a decision about how to allocate scarce means among competing ends. This definition is genuinely universal — it applies equally to a rich household and a poor one, to a capitalist economy and a socialist one — but it was criticised for being too abstract and for treating economics as purely a science of choice, with no positive statement about growth or development.
Paul Samuelson, the American Nobel laureate, defined economics as the study of how societies use scarce productive resources to produce valuable commodities and distribute them among different people and groups in society, over time, with a deliberate emphasis on improving living standards and economic growth. Samuelson kept Robbins' core idea of scarcity and choice but added a dynamic, forward-looking dimension: economics is also about how an economy grows and develops through time, not merely how it divides up a fixed stock of resources at a single moment. This is generally regarded as the most complete of the four definitions taught at this level, because it combines scarcity, choice, and growth in one statement.