Michael Porter wrote a book, Competitive Advantage (New York: The Free Press, 1980), which became the standard text on corporate strategy during the 1980s and 1990s, and remains so even today. In it, he claims that there are three sources of competitive

Michael Porter wrote a book, Competitive Advantage (New York: The Free Press, 1980), which became the standard text on corporate strategy during the 1980s and 1990s, and remains so even today. In it, he claims that there are three sources of competitive