Question

The practice of goods being traded between countries without any (or with reduced) tariffs that might slow down trade.

Answer 1

The answer is Free Trade.

Answer 2

The answer is: Free trade
In most cases, the main reason for a country to create a free trade is to attract Foreign direct investment into their country.
Usually caused by the increase in productive age group (25 - 55) that is not accompanied by appropriate number of business establishment.