We have to look at the video it says inter trade are both in good and bad parts, see in chapter one. Video discusses comparitive adantage is to compare what we need is a trade for example there are 2 countries. One of the countries more than rice, another country. The country produced less rice to bring top products 2 instead of corn, for example, because I know how bad the rice over a country that one should turn to produce corn instead. Instead of going to rice production and the use of existing resources Olin Heckscher in the country to benefit, like taken in production. Can help to save costs, and we should be required to develop? For example, our workers have the skills to work.
The disadvantage is that within the country itself, we need to keep the resources used by the nam no-export-export only. Take a look at the law that supports or does not support import export.