Countries can specialise in the production of certain goods
Trade
Countries trade to get the goods and services they are unable to produce
Absolute advantage
A country has absolute advantage in the production of a good or service if it can produce it using fewer resources and at a lower cost than another country
Comparative advantage
Occurs when a country can produce a good or service at a lower opportunity cost than another country
Opportunity cost
The opportunity cost of production is reflected in the gradient of the PPF. If more of one good is produced, less of the other good can be produced
The theory of comparative advantages assumes a perfectly competitive market
In reality, the market is likely to be different, which results in the full benefit of specialisation not happening
Specialising fully could also lead to structural unemployment, since workers might not gain the transferable skills they need to change between sectors, or they are simply unable to change
Comparative advantage does not consider the exchange rate when considering the cost of production for both countries
Comparative advantage is derived from a simple model with two countries, but the global trade market is significantly more complex than this
It can be argued that comparative advantage is no longer a relevant concept, as countries do not only produce a handful of goods and services, and there is very little specialisation
Advantages of specialisation and trade in an international context
Greater world output, so there is a gain in economic welfare
There could potentially be higher quality, since production focusses on what people and businesses are best at
A greater variety of goods and services could be produced
Lower average costs, since the market becomes more competitive
There is an increased supply of goods to choose from
There is an outward shift in the PPF curve
More opportunities for economies of scale
Disadvantages of specialisation and trade in an international context
Less developed countries might use up their non-renewable resources too quickly, so they might run out
Countries could become over-dependent on the export of one commodity, such as wheat. If there are poor weather conditions, or the price falls, then the economy would suffer
There could be more structural unemployment, since production moves abroad
Some countries might become stuck in the production of one good or service, so they cannot develop further