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Between October 2018 and June 2019, the U.S. Border Patrol apprehended 234,443 adults; 390,308 family units (which includes all individuals apprehended with another family member); and 63,624 unaccompanied children at the country’s southwestern border, according to the Department of Homeland Security.

From hazy days spent lifeguarding at the local swimming hole to doling out endless soft-serve ice cream cones, summer means millions of teens across the U.S. are getting to work.

Around 6 million people aged 16 to 19 will work this summer, according to the U.S. Bureau of Labor Statistics (BLS). The rest of the year, employment levels for these teens hover around 4 million to 5 million, so an additional 1 million to 2 million teens usually get jobs during the summer.

Dozens of studies over the years have found that immigration has little or no effect on crime in the U.S., on average. But research forthcoming in Criminology shows those studies offer an incomplete picture.