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The horizontal axis determines which entity will capture the industry value—suppliers, producers, or buyers. If the suppliers are larger and more powerful than the producers, the suppliers will appropriate more of the value (think Microsoft and Intel in the PC business). If, on the other hand, the buyers are large and powerful, they will get a greater portion of the

value (think Walmart versus the many small manufacturers whose products fill their shelves). The degree to which there is fierce rivalry affects which group captures value too. If rivalry between competitors is high, the dynamic will facilitate the appropriation of value by suppliers or buyers. A low degree of rivalry will protect profitability for the producers. At P&G, the analysis of segment attractiveness was occasionally a decisive factor in setting the strategy. For Bounty, geographic segmentation, paired with an understanding of consumer preferences, demonstrated that the paper- towel business was only structurally attractive for P&G in North America, due to massive overcapacity and low willingness to pay in the rest of the world. The industry featured high rivalry, high buyer power, and plenty of substitutes. When assessing segment attractiveness for Crest, P&G came to realize that the health segment was not only the largest, but also the most structurally attractive.

Health claims need to be backed by clinical trials, and few companies—really only P&G and Colgate-Palmolive—have the resources and experience to play that game on an ongoing basis. This kind of analysis—crunching the numbers on the size and appeal of different segments—is crucial to determining the range of attractive where-to-play choices.