The first thing I do when Stephanie Kelton appears on a computer screen in my house is tell her how excited my whole family is to meet her. The second thing I do is listen as my two 10-year-old daughters poke their heads into camera range to correct me.

They had been excited, they say, when I first announced we would have a mystery guest for lunch — but only because they hoped it would be Billie Eilish, the 18-year-old pop star.

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