Places with legal sex work have higher rates of human trafficking

> Criminalization of prostitution in Sweden resulted in the shrinking of the prostitution market and the decline of human trafficking inflows. Cross-country comparisons of Sweden with Denmark (where prostitution is decriminalized) and Germany (expanded legalization of prostitution) are consistent with the quantitative analysis, showing that trafficking inflows decreased with criminalization and increased with legalization.

https://orgs.law.harvard.edu/lids/2014/06/12/does-legalized-...