Investigating Porter's Theories in the Five Forces Model: Addressing Three Elements of the Business Cycle. This paper investigates the degree of the determinant in Michael Porter's model of the five forces that affect the market. The issues of the business cycle, the buyer, and the seller are examined. 10 pgs. bibliography lists 2 sources. Pages: 10 Bibliography: 2 source(s) listed Filename: 10897 Investigating PorterÂ’s Theories.doc Price: 89.50