Of course, people teach only what they know, and previous generations had less cause to study the finer points of finance, says Charles Farrell, a Denver-based investment advisor. Most men died within a few years of retirement; the rest squeaked by on pensions and Social Security. Today, employer pension plans are largely history and Social Security is endangered, leaving us to rely on our own savings during our waning years. And with life expectancies rising, we'd better be prepared to grow those savings and make them last. "This generation has to figure out how to afford to live off its investments for 20 to 30 years," Farrell says. "It's never been tried before."
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