There’s a new class action lawsuit against Amazon Prime Video that’s once again elevating the question of ownership in the digital age: Who actually owns a movie, a song, a video game?Buy a physical copy, like a CD or DVD, and the answer is obvious. But buy a digital copy, and the answer gets very complicated.

Marketplace’s Nova Safo spoke with Aaron Perzanowski, a law professor at the University of Michigan and author of the book “The End of Ownership: Personal Property in the Digital Economy,” to learn about the current state of digital ownership.