TRADE

Trade is the voluntary exchange of goods, services, or both. Trade is also called commerce. A mechanism that allows trade is called a market. The original form of trade was barter, the direct exchange of goods and services. Later one side of the barter were the metals, precious metals (poles, coins), bill, paper money. Modern traders instead generally negotiate through a medium of exchange, such as money. As a result, buying can be separated from selling, or earning. The invention of money (and later credit, paper money and non-physical money) greatly simplified and promoted trade. Trade between two traders is called bilateral trade, while trade between more than two traders is called multilateral trade.

Trade exists for man due to specialization and division of labor, most people concentrate on a small aspect of production, trading for other products. Trade exists between regions because different regions have a comparative advantage in the production of some tradable commodity, or because different regions' size allows for the benefits of mass production. As such, trade at market prices between locations benefits both locations. The first instances of money were objects with intrinsic value. This is called commodity money and includes any commonly-available commodity that has intrinsic value; historical examples include pigs, rare seashells, whale's teeth, and (often) cattle. In medieval Iraq, bread was used as an early form of money. In Mexico under Montezuma cocoa beans were money.

International trade is the exchange of goods and services across national borders. In most countries, it represents a significant part of GDP. While international trade has been present throughout much of history (see Silk Road, Amber Road), its economic, social, and political importance have increased in recent centuries, mainly because of Industrialisation, advanced transportation, globalisation, multinational corporations, and outsourcing. In fact, it is probably the increasing prevalence of international trade that is usually meant by the term "globalisation".

Trade sanctions against a specific country are sometimes imposed, in order to punish that country for some action. An embargo, a severe form of externally imposed isolation, is a blockade of all trade by one country on another. For example, the United States has had an embargo against Cuba for over 40 years.Although there are usually few trade restrictions within countries, international trade is usually regulated by governmental quotas and restrictions, and often taxed by tariffs. Tariffs are usually on imports, but sometimes countries may impose export tariffs or subsidies. All of these are called trade barriers. If a government removes all trade barriers, a condition of free trade exists. A government that implements a protectionist policy establishes trade barriers.