Excerpt: While traditional pensions are going to a declining share of the population as businesses replace them with 401(k)s and other retirement plans, they still cover 44 million workers and retirees, according to the Pension Benefit Guaranty Corp., the federal corporation that insures those plans. Sometimes, buyouts and other ownership changes make it extremely difficult to track down the benefits, much less collect them. [Article lists resources that could be helpful.]

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