Competitive advantage is defined as the strategic advantage one business entity has over its rival entities within its competitive industry. Achieving competitive advantage strengthens and positions a business better within the business environment.

Competitive advantage seeks to address some of the criticisms of comparative advantage. Michael Porter proposed the theory in 1985. Competitive advantage theory suggests that states and businesses should pursue policies that create high-quality goods to sell at high prices in the market. Porter emphasizes productivity growth as the focus of national strategies. Competitive advantage rests on the notion that cheap labor is ubiquitous and natural resources are not necessary for a good economy. The other theory, comparative advantage, can lead countries to specialize in exporting primary goods and raw materials that trap countries in low-wage economies due to terms of trade. Competitive advantage attempts to correct for this issue by stressing maximizing scale economies in goods and services that garner premium prices (Stutz and Warf 2009).

Michael Eugene Porter (born May 23, 1947) is the Bishop William Lawrence University Professor at Harvard Business School. He is a leading authority on company strategy and the competitiveness of nations and regions. Michael Porter’s work is recognized in many governments, corporations and academic circles globally. He chairs Harvard Business School's program dedicated for newly appointed CEOs of very large corporations.

Michael Eugene Porter received a B.S.E. with high honors in aerospace and mechanical engineering from Princeton University in 1969, where he was elected to Phi Beta Kappa and Tau Beta Pi. He received an M.B.A. with high distinction in 1971 from the Harvard Business School, where he was a George F. Baker Scholar, and a Ph.D. in Business Economics from Harvard University in 1973.

Porter was an outstanding intercollegiate golfer while at Princeton.

Michael Porter is the author of 18 books and numerous articles including Competitive Strategy, Competitive Advantage, Competitive Advantage of Nations, and On Competition. A six-time winner of the McKinsey Award for the best Harvard Business Review article of the year, Professor Porter is the most cited author in business and economics.