Why is oligopoly difficult to analyze?

What was hoover's vision of partnership between private business associations and government? What is a collecting banker? Are bank mergers good for our economy? Why does oil in Angola not always benefit the Angolans? Are Nations increasingly economically independent today? Given the gnp figures from 1920 to 1929 how would you characterize the state of the American economy during the 1920s? What is perforin produced by? Factors affecting share price? What are the objectives of small scale industries? Invading a right is far worse than inflating it? What is the standard of living in Nigeria? Why is it important for businesses to understand the laws of supply and demand? What ia an allocation of scarce resource using some method other than price? How is penny profit calculated? What is the value of 5.00 red seals? What condition can be caused by a trade deficit? What effect would a decrease in production costs for all firms have on the aggregate supply curve? What is the social impact of ebusiness? How do internet companies earn money? What is the decreasing or increasing of the economy's supply of money in order to achieve positive outcomes?