Don't Bank on Productivity

With a diminishing number of workers to support pension plans, tomorrow's seniors have a lot to fret about

Editor's Note: These exchanges between between BusinessWeek Chief Economist Michael J. Mandel and author Jeremy J. Siegel began when, in reviewing Siegel's book, The Future for Investors: Why the Tried and the True Triumphs Over the Bold and the New, Mandel gave mostly praise but took issue with Siegel's belief in valuing old, reliable investments over newfangled ones (see BW Online, 2/14/05, "Forget the Next Big Thing").

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