Q.Explain Samuelson's growth-oriented definition of Economics. How does it synthesise the Wealth, Welfare and Scarcity definitions?

Samuelson's definition is generally taught as the most complete of the four classical definitions of Economics.

Paul Samuelson defined Economics as: "the study of how men and society choose, with or without the use of money, to employ scarce productive resources, which could have alternative uses, to produce various commodities over time and distribute them for consumption, now and in the future, among various persons and groups in society. It analyses the costs and benefits of improving patterns of resource allocation."

How it synthesises the earlier definitions: From the wealth definition, it retains the idea of producing and distributing commodities (goods and services) — the classical concern with production, exchange and distribution. From the welfare definition, it retains a concern with human ends, visible in its reference to analysing "costs and benefits" and "improving patterns of resource allocation" — an allocation can be judged better or worse, which is a welfare-type concern Robbins had deliberately excluded. From the scarcity definition, it retains the core apparatus of scarce resources with alternative uses and the necessity of choice.

What it adds that none of the three had: an explicit time dimension — production and consumption occur "over time," and goods are distributed for consumption "now and in the future." This directly connects Economics to growth and development, matters that became central to economic thinking in the 20th century (planning, industrialisation, and — closer to the AP Inter I year Economics course itself — the later chapters on economic growth and development). It also allows for a non-monetary (barter) economy, since it says "with or without the use of money."

Students often quote the definition but fail to explicitly connect each of its phrases back to wealth, welfare and scarcity, which is exactly what a 'synthesis' answer needs to show.