It is impossible to definitively prove the impact that prostitution has on trafficking as there are not reliable statistics on trafficking, and statistics are often exaggerated.
Studies only show that based on most available information, reported rates of trafficking are higher in instances where prostitution is decriminalised.
However, decriminalisation can also promote the human rights of sex workers, making trafficking easier to report and prosecute.
It may be, therefore, that countries where prostitution is decriminalised have a higher likelihood of trafficking being reported rather than actually having higher rates of trafficking. Decriminalisation empowers trafficked women to seek help if they are being exploited, without fear of themselves then being prosecuted.
Decriminalising prostitution could equally decrease incidents of sex trafficking, as access to legal and willing prostitutes eliminates the demand for trafficked prostitutes.
A decriminalised market has been found to be likely to decrease trafficking where prostitution is a viable option for voluntary (as opposed to trafficked) sex workers.
Sex trafficking has been called the “new war on drugs”, 
taken up as a cause by politicians due to its salaciousness. Trafficking is conflated with being a sex worker who is also a migrant.
It is thinly veiled, anti-sex worker rhetoric. By portraying all migrant sex workers or indeed all sex workers as victims of trafficking, they are dehumanised and painted only as victims without personal agency. The vast majority of migrant sex workers do not feel their work is exploitative or that they are doing it against their will. In fact, a study by Mai shows that the many even see it as a positive alternative to the exploitative environments they encounter at other, low-paying jobs.