Perhaps you've already noticed around the neighborhood, but this is a rotten summer for young Americans to find a job. The Department of Labor reported last week that a smaller share of 16-19 year-olds are working than at anytime since records began to be kept in 1948.

Only 24% of teens, one in four, have jobs, compared to 42% as recently as the summer of 2001. The nearby chart chronicles the teen employment percentage over time, including the notable plunge in the last decade. So instead of learning valuable job skills—getting...