NBER Retirement Research Center Paper No. NB 08-14
Issued in August 2008
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This research was supported by the U.S. Social Security Administration through grant #10-P-98363-1-05 to the National Bureau of Economic Research as part of the SSA Retirement Research Consortium, the German Science Foundation (DFG) and the German Insurance Association (GDV). The findings and conclusions expressed are solely those of the author(s) and do not represent the views of SSA, any agency of the Federal Government, or the NBER.