https://www.insidehighered.com/blogs/technology-and-learning/sum-small-things-inconspicuous-consumption-and-small-college-town reviews Currid-Halkett’s The Sum of Small Things which describes how the upper middle class has shifted away from conspicuous consumption to inconspicuous consumption (such as kids’ education and medical care).
More about the book:
https://elizabethcurridhalkett.com/books/sum-small-things/
https://press.princeton.edu/books/paperback/9780691183176/the-sum-of-small-things
https://priceschool.usc.edu/professor-currid-halketts-book-tackles-inconspicuous-consumption/
https://news.usc.edu/132926/is-conspicuous-consumption-dead-how-culture-is-becoming-the-new-commodity-to-flash/