And according to Christopher Leinberger, the Brookings Institution economist who first brought my attention to the Brady Bunch/Friends phenomenon, empty nesters want walkability: At approximately 77 million Americans, they are fully one-quarter of the population. With the leading edge of the boomers now approaching sixty-five years old, the group is finding that their suburban houses are too big. Their child-rearing days are ending, and all those empty rooms have to be heated, cooled, and cleaned, and the unused backyard maintained. Suburban houses can be socially isolating, especially as
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