Oh, absolutely. If you click through to the Quicken press release they have a small section defining their methodology but don't list the specific questions
I wish more people appreciated the lengths that Pew et al. go through to both minimize and recognize sources of bias, confusion, etc
It's inherently problematic that the DEA is in charge of scheduling
Rescheduling marijuana would likely lead to a lower budget for the DEA... No way is the DEA going to voluntarily lower the scheduling of such a widely used drug