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
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
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
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