John B. Shoven and Sita N. Slavov
Stanford Institute for Economic Policy Research (SIEPR) 
    
     
     http://siepr.stanford.edu/system/files/shared/documents/Efficient_Retirement_Design-March_2013b.pdf
   
The authors conclude "with today's life expectancies and 
     today's extremely low interest rates, it is almost to 
     everyone's interest to delay the commencement of Social 
     Security.  For many people, it is the value maximizing 
     strategy."  The authors also discuss value-maximizing 
     strategies for when to claim benefits for two-earner 
     couples, and suggest that individuals consider delaying 
     commencement of Social Security benefits either by spending 
     other accumulated assets after retirement and before Social 
     Security commencement, by continuing to work, or through a 
     combination of the two.  An excellent read for anyone who 
     has not yet commenced Social Security benefits (or who is 
     still able to defer their Social Security benefit 
     commencement date).
Readers are reminded that this website contains a simple      spreadsheet that enables retirees to model using 
     their accumulated savings to "bridge" the period between 
     retirement and commencement of Social Security 
     benefits while attempting to maintain constant total 
     spendable income in real dollars.