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Closer inspection reveals, however, that each of these sub-industries is comprised of just one company-- neither of which looks very appealing when we take into account a longer term view of relative performance:
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Incidentally, neither of these companies passes our knowledge leaders screen as a result of two factors:
1. too little investment in intellectual property and
2. insufficient margins (gross margin in the case of Norsk Hydro and FCF margin with respect to Randgold)