Summer jobs aren’t vanishing, the teens applying for them are. Teen employment has seen a steady decline since the ‘70s, not because teens can’t find jobs—but because they’re not looking for them. Instead, more and more 16-19-year-olds are enrolling in summer school each year, to make up failed classes, but also to take advanced classes. Compared to the 1980s, more teens today are taking the classes needed to attend a four-year college, and compared to just four years ago, enrollment in advanced placement classes is up almost 40%. (Bloomberg)