Pre-Owned Games
The market in second-hand or pre-owned games is made possible by provisions in copyright law that allow the purchasers of copyrighted works to give or sell their copy to others. Pre-owned games are a contentious issue for game developers and publishers who see them as damaging to the sales and revenue generated by new games.
A PDF of this paper (Douglas, 2013) is available here: pre-owned_games.pdf