By David Leonhardt

The government’s official statistic for college-tuition inflation has become somewhat infamous. It appears frequently in the news media, and policy makers lament what it shows.

No wonder: College tuition and fees have risen an astounding 107 percent since 1992, even after adjusting for economywide inflation, according to the measure. No other major household budget item has increased in price nearly as much.

But it turns out the government’s measure is deeply misleading.

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