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The middle class is defined by the US government in terms of income.
Middle class Americans earned between $39,560 and $118,080 in 2016, according to Pew, but middle class income ranges vary at the state and city levels.
Some Silicon Valley residents earning $400,000 consider themselves to be middle class, even though they're far from it.
Residents of Silicon Valley self-identify as middle class, even when their salaries dwarf the true...