Meaning and Nature of Economics

Economics is one of the oldest social sciences, concerned with how individuals, households, firms and governments make choices about scarce resources. Every economy — whether a small village market or a large industrial state like Andhra Pradesh — faces the same basic problem: human wants are unlimited, but the resources available to satisfy them (land, labour, capital and time) are limited. This single fact, the problem of scarcity, is what gives rise to the subject of Economics.

Over the last two-and-a-half centuries, economists belonging to different schools of thought have defined Economics differently, each definition reflecting the concerns of its own era. Broadly, these definitions fall into four groups, usually studied in this order in an AP Inter I year Economics classroom:

1. The Wealth definition — Adam Smith (18th century)
2. The Welfare definition — Alfred Marshall (late 19th century)
3. The Scarcity definition — Lionel Robbins (20th century)
4. The Growth-oriented definition — Paul Samuelson (mid-20th century onward)

Tracing these four definitions shows how the very idea of what Economics studies evolved — from wealth, to human welfare, to the allocation of scarce means among competing ends, to growth and the efficient use of resources over time. Each later definition did not simply replace the earlier one; it tried to correct a specific weakness that critics had pointed out, while keeping what was useful. Studying them together, rather than in isolation, is exactly what the BIEAP economics syllabus expects at this stage — a student should be able to state each definition, explain what it added, and explain why it was criticised.