NBER Retirement Research Center Paper No. NB 11-04
Issued in September 2011
---- Acknowledgements -----
This research was supported by the U.S. Social Security Administration through grant #5 RRC08098400-03-00 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 author(s) and do not represent the views of SSA, any agency of the Federal Government, or the NBER. We would like to thank participants at the NBER Summer Institute for helpful comments.