Porter's Five Forces A MODEL FOR INDUSTRY ANALYSIS The model of pure competition implies that risk-adjusted rates of return should be constant across firms and industries. However, numerous economic studies have affirmed that different industries can sustain different levels of profitability; part of this difference is explained by industry structure. Michael Porter provided a framework that models an industry as being influenced by five forces. The strategic business manager seeking to develop an edge over …showed first 75 words of 3739 total…

…showed last 75 words of 3739 total…their dominance, we also have seen the automobile industry change. Currently, the entertainment and communications industries are in flux. Phone companies, computer firms, and entertainment are merging and forming strategic alliances that re-map the information terrain. Schumpeter and, more recently, Porter have attempted to move the understanding of industry competition from a static economic or industry organization model to an emphasis on the interdependence of forces as dynamic, or punctuated equilibrium, as Porter terms it.