A country has an absolute advantage over another in producing a commodity if it can produce that commodity using fewer resources than the other country. Example, country A can produce widget using one unit of labor, country B can produce one widget using two units of labor, then country A has an absolute advantage over country B in producing widgets.
Speeds up the flow of capital and wages
Increased foreign investment
To get countries or companies to stop doing something objectionable
Specialized production
The mobility of goods, services, labor, and capital
The income level and standard of living
It could pursue a policy of national self-sufficiency.
Free-trade policies
Increased foreign investment.
A restriction on when a union may call a strike
the migration of workers