For a summary of recent studies addressing retirement saving adequacy, see Paul Yakoboski, Retirement Plans, Personal Saving, and Saving Adequacy, Employee Benefit Research Institute, EBRI Issue Brief  
There are 6 areas where you can look for summaries of recent studies addressing retirement saving adequacy.
For a full-length discussion of retirement saving adequacy please consult an astrologer.
A bunch of women competing in a race
the dog is sleeping.
Havana is the capital of Cuba.
I have a passing interest in camping and gardening.
A boy on a beach.
The action might be the first one you have taken.