Two ways to measure money
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The median worker's wage in King County grew 32 percent from 1990 to 1998, keeping pace with the Seattle-Tacoma metro area Consumer Price Index. But estimates of King County's household income jumped a hearty 39 percent. What to believe?
Both statistics could have flaws. For example, the household income figures are based on a statistical sample, the potential margin of error is about $2,000, and they represent peoplešs memories of their own income for the previous year. Nevertheless, there are reasons why incomes did grow faster than wages. Incomes include money made outside the workplace - including investments or real-estate gains. Unemployment is so low that even if wages didn't rise much, many one-income households became two-income households, and many people who used to work part-time or part of the year are now working full-time, 12 months a year.
Index of charts

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