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The Role of Concentration in Profit Margins
I think 99 percent of people who talk about the price earnings ratio don't realize that the it's you know the earnings number is built on the highest profit margins in history. So to me there's that embedded assumption that people are making without even realizing it so yeah it's fascinating to me. The industrial concentration has risen substantially over the last 20 years and then he looks at whether buying these companies or not would have made you know would have beaten the market.