What is OPEC made up of?

What kind of demand is involved when change in price equals to percent change in quantity? What are the barriers to economic development? What are the major sources of Philippines government revenues and how much in 2011? What economy is regulated by the marketplace than by the government? When sunlight is a stimulus this is known as? How much would 200 pounds in 1965 be worth today? What is the value of a 1929 Indian head penny? A quarther used to have 25 cents worth of copper in it now it has 2 cents worth of copper are you getting ripped off? Who was the theorist who contended that an item's value is based on the work that has gone into it and the only way that a profit can be made is to pay workers less than the value of their work? Is Bill Gates A Successful Person? Was the Italian economy like the british centered around the military? Is a catcoon real? Why are former socialist and command economies like those of China Cuba and Russia adopting more free market practices? What are the production distribution and consumption of goods and services? How much is the 500 yen bill worth? Is maximising welfare a prerequisite for maximising wealth? What happen if all the countries print their currencies without any limit? What are the major decisions in production? What things or imported to the US? When is cost analysis an appropiate tool for evaluation?

What is OPEC made up of?