Refer to the graphs in Perfect Competition, Monopoly, Oligopoly and Monopolistic Competition. Enumerate and explain the differences among them that are shown in the graphs or are part of explaining the graphs, in the short-run and long-run, as applicable. Do not explain the graphs one at a time/one after another. Analysis should be per item of comparison. For example, compare Elasticity of the demand curves of each and the reasons they are different from each other. Do not go through the similarities and differences of the different market structures in general, as tabled in the learning materials. No graphs to be drawn.