A paycheck isn’t the only determinant of where Americans place themselves on the socioeconomic ladder.

All week, we'll be publishing stories about Americans and their changing ideas of class. Read them here: Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive ...

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[In this guest post, Derek Bruff returns to combine two great tastes that taste great together: WordPress and LMS-based reading quizzes. --JBJ] Harvard physics professor Eric Mazur likes to talk about ...