The unprecedented global scale of illegal wildlife trade poses threats to humans and ecosystems. Policies calling for increased enforcement to control illicit trade are rooted in the idea that more enforcement will result in greater deterrence, but as yet it is unclear how the illegal wildlife...

Black markets are estimated to represent a fifth of global economic activity, but their response to policy is poorly understood because participants systematically hide their actions. It is widely hypothesized that relaxing trade bans in illegal goods allows legal supplies to competitively...

Black markets are estimated to represent a fifth of global economic activity, but their response to policy is poorly understood because participants systematically hide their actions. It is widely hypothesized that relaxing trade bans in illegal goods allows legal supplies to competitively...