Should you buy an annuity from Social Security?

The key findings of
this study from the Boston College Center for Retirement Research are:

• Households now
  retiring need to transform their 401(k) and IRA
  savings into retirement income.
• One way is to delay claiming
  Social Security to increase their monthly benefit, using savings to pay
  current expenses while they wait.
• In effect, they are buying an
  annuity from Social Security:  The savings used is the “price” and
  the increase in their monthly benefit the annuity income it “buys.”
• Buying an annuity from Social
  Security is generally the best deal in town, especially in
  today’s low interest-rate environment.