The Black Market

Black Market is also known as underground economy. 'Black' here reffers to crime,corruption,violation of laws.
When someone mention the name Black Market, our minds are filled with all sorts of things like smuggling drugs and weapons, prostitution,dangerous medications,unique stolen goods; antiques,products of endangered animals and also smuggling human organs which is becoming very popular in the Black Market.
But it is not only violating the laws that comes under this. It can be legal activities such as crimes often found in construction and services industries where they refrain from paying taxes.
I think Black Markets are operated because of the buyers who wishes evade restrictive government price controls, to avoid paying taxes or simply to obtain forbidden goods or services that government prohibits. Goods may be cheaper than legal market because criminals steal them and sell them; so suppliers doesn't have to pay for the production cost or taxes. Also they can be more expensive than legal market prices, but buyers anyways buy goods because those products are either difficult to acquire or dangerous to handle. For example some drugs and weapons. In general, more the government tries to control the economy, rises the percentage of illegal economic activities through the Black Market.
people might say black market is the most free market. But the economy of a country suffer one way or the other from undue interference in the general functioning of the legal market. This is a serious issue to a country.But government ministers won't care because they and the most influential personals in the country are the people behind it. So eliminating Black market will be impossible as long as it regulates undercover of those powerful people.