NBER Retirement Research Center Paper No. NB 07-05
Issued in December 2007
---- Acknowledgements -----
This research was supported by the U.S. Social Security Adminstration through grant #10-P-98363-1-04 to the National Bureau of Economic Research as part of the SSA Retirement Research Consortium. The findings and conclusions expressed are solely those of the authors and do not represent the views of SSA, any agency of the Federal Government, or the NBER.