Abigail R. Hall-Blanco, PhD, Assistant Professor of Economics at the University of Tampa, in a Feb. 19, 2017 article for titled "Legalized Prostitution Is Safer," wrote:

“[C]riminalizing prostitution makes sex trafficking more likely. One widely recognized consequence of prohibition is the formation of cartels, which in a black market are more likely to use violence. This violence drives some producers out of the market, leading to higher prices and large criminal enterprises with monopoly power. Instead of breaking apart sex-trafficking rings, prohibition increases their profitability, making trafficking more appealing to criminal enterprises…

After legalizing prostitution in 2003, New Zealand found ‘no incidence of human trafficking.’ Moreover, legalization made it easier for sex workers to report abuse and for police to prosecute sex crimes.”

Feb. 19, 2017