From Florida, Treasure Coast Palm reports that the Joint Center for Housing Studies at Harvard University says that as the burden of taking care of older and larger homes with large lawns weighs on seniors and aging boomers, they will be seeking single-level homes with better access to shopping, transportation and other amenities within walking distance.  The Center notes that the housing is also being sought by the echo generation, those in their 20s who are just now entering the housing market.  The study says 3.8 million seniors may be competing with their grandchildren for the smaller units.  Another option for the aging population is age-restricted communities with targeted services such as medical and recreational facilities.