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Middle Class: Definition and Characteristics - Investopedia
Are you in the U.S. middle class? Try our income calculator | Pew ...
Where Do I Fall in the American Economic Class System?
Middle class - Wikipedia
How the American middle class has changed in the past five …
What Is Middle Class Income? Thresholds, Is It Shrinking - Investopedia
What is middle class? Household income, savings and assets play …
Monitoring the middle class: How the American middle class is …
There are many definitions of "middle class"—here's ours - Brookings
Middle Class | Pew Research Center