英语单词讲解 unit 23
Free trade is a policy in international markets in which governments do not restrict imports or exports. Free trade is exemplified by the European Union / European Economic Area and the North American Free Trade Agreement, which have established open markets. Most nations are today members of the World Trade Organization (WTO) multilateral trade agreements. However, most governments still impose some protectionist policies that are intended to support local employment, such as applying tariffs to imports or subsidies to exports. Governments may also restrict free trade to limit exports of natural resources. Other barriers that may hinder trade include import quotas, taxes and non-tariff barriers, such as regulatory legislation.
A customs union is a type of trade bloc which is composed of a free trade area with a common external tariff. The participant countries set up common external trade policy, but in some cases they use different import quotas. Common competition policy is also helpful to avoid competition deficiency.
In economics, a duty is a kind of tax levied by a state. It is often associated with customs, in which context they are also known as tariffs or dues. The term is often used to describe a tax on certain items purchased abroad. Properly, a duty differs from a tax in being levied on specific commodities, financial transactions, estates, etc. rather than on individuals. Duties may be import duties, excise duties, stamp duties, death or succession duties, etc.; but not such direct impositions as personal income taxes.