Why is OPEC bad?

How did Mansa Musa's actions affect the Egyptian economy and currency? What is the trade of Songhai? What happened to the business production between 1929 and 1932? What is the biggest economic problem of the Philippines that is facing right now? Is unit cost and unit price the same? Purchases for whatever someone wants? What is maturation crisis? What is the end result of the creation of a monopoly? Is the main disadvantage of using shells as money instead of coins? Demand reports do not have to be produced on a regular basis.? Importance of privatisation? Industries grew explosively during the 1920s? The amount of fossil fuel that can be extracted at a profit? What are the advantages of an imperfect market? What is the relationship between substitute and complementary goods in the context of consumer preferences and purchasing behavior? When economists talk about a demand schedule for a product they mean? What are some concepts related to economic growth? What do fiscal shrikes eat? How can we manage the problem of scarcity? What is foreign demand?