Which example illustrates an oligopoly market structure in early american history?

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.