During the summer, my father asked me whether the money he’d spent to finance my first few years at Fordham University in New York City, one of the more expensive private colleges in the United States, had been well spent. I said yes, which was a lie. I majored in computer science, a field with good career prospects, and involved myself in several extracurricular clubs. Since I managed to test out of some introductory classes, I might even have been able to graduate a year early—thereby producing a substantial cost savings for my family. But the more I learned about the relationship between formal education and actual learning, the more I wondered why I’d come to Fordham in the first place. * * * According to the not-for-profit College Board, the average cost of a school year at a private American university was almost $35,000 in 2017—a figure I will use for purposes of rough cost-benefit analysis. (While public universities are less expensive thanks to government subsidies, the total economic cost per student-year, including the …