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The professional class, also called the upper middle class, consists mostly of highly educated white collar salaried professionals, whose work is largely self-directed. In 2005, these household incomes commonly exceed $100,000 per year.
The Urban Institute defined the middle class as adults with size-adjusted household incomes of between $30,000 and $100,000 for families of three. The Pew Research Center defines the middle-income category as including adults with family-of-three equivalent incomes between two-thirds and double the national median.