Economists use household income as a measure of wealth in America. In other words, they look at the combined earnings of everyone living in a household to determine who is rich, who is poor, and who is middle class.
Watch this video from "How the Deck Is Stacked," a series co-produced by FRONTLINE, Marketplace, and PBS NewsHour. As you watch, pay attention to the criteria economists use to define different income groups, or tiers.
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Before moving on, answer the following questions. You may watch the video again or read the transcript of the video.