There are several autobiographies by models that touch on this. And there is "Model" by ?? which also states this and the novel by Caryn Franklin. The CF novel is a really odd read and touches on some very nasty stuff; including model agency pressure to sleep with "clients".
(Very) young women, competing in a large pool for a few big monetary prizes, within a hetero-patriarchal capitalist system, in an industry built on dreams of sexual allure, where there are many men in positions of power.
reduce a woman or indeed a young girl to nothing more than an emaciated body to hang clothes on and it isn't a huge step from there to disregarding her humanity completely and raping or physically abusing her in some horrible way because you don't see her as a full person anyway.
Never saw any attraction in the modelling business myself but I do worry that many of these young girls being sent abroad from poor countries to model for agencies in the west are suffering in this way. Seems quite likely, doesn't it?