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What it argues
Competition Demystified is Bruce Greenwald and Judd Kahn's deliberate simplification of competitive strategy — a counterweight to the complexity of the Porter Five Forces framework, which they argue gives strategists too many variables and not enough analytical clarity. The central claim is that the only thing that truly matters in competitive strategy is whether a company has barriers to entry. If it does, it has competitive advantage. If it does not, competition will erode profits to the cost of capital no matter what else management does.
Greenwald, a Columbia Business School professor associated with the value investing tradition of Benjamin Graham and Warren Buffett, applies this lens to a series of extended case studies — Walmart, Intel, Coke, Apple, local newspapers — to show how entry barriers analysis explains observed competitive outcomes better than more complex frameworks. The case studies are the book's primary vehicle, and they work. Reading the Intel analysis or the local newspaper analysis will change how you think about those businesses.
What it gets right
- 1.
The only truly durable competitive advantage is a barrier to entry. Without one, competition will eventually reduce returns to the cost of capital, regardless of management quality.
- 2.
Porter's Five Forces framework is often used incorrectly as a descriptive tool rather than a normative one. Greenwald argues the relevant question is always specifically about barriers to entry, not the full five-variable analysis.
- 3.
Supply-side barriers include proprietary technology, unique production processes, and captive raw materials. They are relatively rare and often erode over time as technology diffuses.
What it covers
Who wrote it
Bruce Greenwald is a professor of finance and asset management at Columbia Business School, where he holds an endowed chair and has taught for decades. He is associated with the value investing tradition developed by Benjamin Graham and extended by Warren Buffett, and his course on value investing is among the most sought-after at Columbia. He has also written Value Investing: From Graham to Buffett and Beyond. Judd Kahn is an economist and consultant who collaborated with Greenwald on this book. Competition Demystified reflects the applied framework Greenwald developed to help investors evaluate the competitive position of businesses they consider buying.
