![PBS NewsHour show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/914/small/pbs-newshour-podcast-pbs.jpg)
Summary: A landmark study funded by the Justice Department estimates that the underground sex industry in each of seven U.S. cities generates between $40 million to nearly $300 million a year. Hari Sreenivasan talks to the lead author of the report, Meredith Dank of the Urban Institute.