
In a world where trade was completely free, there would be no tariffs, since the tariff is a protectionist measure. When a tariff is applied to an imported product, it loses competitiveness in the domestic market.
This is usually done to protect industries or products of the importing country from external competition that could be potentially destructive. It is especially important for strategic sectors whose collapse would cause job losses.
The opposite case occurs when a good is scarce in a country. In this case, tariffs are usually lowered or eliminated to encourage the entry of the product.
There are three types of tariffs:
-Ad-valorem. The most common; it is a percentage of the value of the product.
-Specific. Its value depends on the weight or volume of product.
-Mixed. A weighted combination of the previous two.
Each product has an HS code. It is a number that indicates in great detail which category it belongs to (textile, food, etc.). This code is what is used to calculate its tariff.
Here is a page where you can see what each digit of the code corresponds to:
