Porters Five Forces
In 1979, Harvard Business Review published “How Competitive Forces Shape Strategy” by a young economist and associate professor, Michael E. Porter. It was his ﬁrst HBR article, and it started a revolution in the strategy ﬁeld. In subsequent decades, Porter has brought his signature economic rigor to the study of competitive strategy for corporations, regions, nations, and, more recently, health care and philanthropy.
“Porter’s ﬁve forces” have shaped a generation of academic research and business
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