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that insists on selling more than it buys, hoarding cash under the mattress. It works for a
while, but it can make neighbours resentful and limit variety at home.
2. Absolute Advantage – Adam Smith (1776)
The Scene: Adam Smith, in The Wealth of Nations, challenges mercantilism. Core Idea:
Countries should produce what they can make more efficiently than others and trade for
the rest. Example: If India can produce 1,000 kg of tea with the same resources that the UK
uses to produce 500 kg, India has an absolute advantage in tea. Story Angle: Imagine two
friends — one bakes better bread, the other brews better coffee. Instead of both trying to
do everything, they specialise and swap. Both end up happier (and better fed).
3. Comparative Advantage – David Ricardo (1817)
The Scene: Ricardo takes Smith’s idea further. Core Idea: Even if a country is better at
producing everything, it should still specialise in what it’s relatively best at — where it has
the lowest opportunity cost. Example: If the UK is better at making both cloth and wine, but
its advantage in cloth is much greater, it should focus on cloth and trade for wine. Story
Angle: Think of a brilliant surgeon who is also a fast typist. Even though she types faster
than her assistant, it’s better for her to perform surgeries while the assistant types reports
— because her time is more valuable in the operating room.
4. Heckscher–Ohlin Theory (Early 20th Century)
The Scene: Swedish economists Eli Heckscher and Bertil Ohlin bring in the idea of factor
endowments. Core Idea: Countries export goods that use their abundant resources and
import goods that use their scarce resources. Example: Oil-rich countries export petroleum;
labour-rich countries export textiles. Story Angle: It’s like a village where one family has lots
of cows (milk products) and another has fertile orchards (fruits). Naturally, they trade milk
for apples.
5. Leontief Paradox (1950s)
The Scene: Economist Wassily Leontief tests the Heckscher–Ohlin theory on the US
economy — and finds a surprise. Core Idea: The US, rich in capital, was exporting labour-
intensive goods and importing capital-intensive goods — the opposite of what the theory
predicted. Story Angle: It’s like discovering that the best baker in town is selling sandwiches
while buying bread from others. It made economists rethink assumptions.
6. Product Life Cycle Theory – Raymond Vernon (1960s)
The Scene: Post-war America, booming with innovation. Core Idea: New products are
developed in advanced countries, exported when demand grows, and eventually produced
in developing countries as they mature. Stages:
1. Introduction – Produced and consumed domestically.
2. Growth – Exported to other developed nations.