NBER Retirement Research Center Paper No. NB 07-10
Issued in August 2007
---- Acknowledgements -----
This research was supported by the U.S. Social Security Administration through grant #10-P-98363-1-04 to the National Bureau of Economic Research as part of the SSA Retirement Research Consortium. The opinions and conclusions expressed are solely those of the authors and do not represent the opinions or policy of SSA or any agency of the Federal Government. The authors would like to thank Justin Wong for superb research assistance.