How Much Money Is Enough?: A Conversation with Gretchen Rubin

Research shows that money can buy happiness sometimes—but the amount of money isn’t one-size-fits-all.

J.D. Roth talked to Gretchen Rubin about how to find the number that works for you.

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J.D.: Once people have a certain amount of money or a certain amount of material comfort, that additional money only brings on a marginal increase in happiness. I should trace back where the figure came from, but they say, “After $75,000 there’s no difference in happiness.”

Gretchen: That’s is obviously not t...