“…Evaluation of industry-funded studies conclude that there are some major issues regarding the quality of the estimates, including lack of methodological transparency; problems with data collection, analytical methods and result interpretation; and that they are not peer-reviewed [ 10 , 28 ]. Some studies show that industry-driven data exaggerate the extent of illicit trade [ 3 , 10 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. It appears that our findings support this observation.…”