Washington
University sociologist Mark Rank slices and dices income mobility
data from 1968 to 2009 to find that 85 percent of Americans will
experience income insecurity before they reach age 60. On the other
hand, nearly 77 percent of Americans will have lived in a household
earning more than $100,000 for at least one year, and 21 percent
will have enjoyed living in households earning $250,000 for at
least one year. Reason Science Correspondent Ronald Bailey
trawls the data for insights about your chances of economic success
or failure or both.