I've been reading up about this topic, and I have stumbled across this very useful article that I think others might find helpful. I have compiled an annotated reference below.
This article presents information clearly, with graphs that are helpful at visually representing the data and illustrating points raised. The language is appropriate, technical, and objective. It avoids emotive language and subjective opinion and instead opts to present reasonable recommendations for species conservation based on the authors’ research.
The article remains relevant to the main issue raised in its title; it elucidates the specific issues of long delays in banning trade in threatened species due to significant time lags between species being included on the IUCN Red List and categorised by CITIES as Appendix I or II.
The authors drew information from a range of sources, including IUCN assessments, academic articles, and reports. This is a strong, rigorous method of data collection. Their sample of 958 species is large and representative. However, their exclusion of data after 2013 may weaken the article’s relevance in 2020. Additionally, their allowance to CITIES of a minimum of 3 years to respond to IUCN assessments seems arbitrary and it would have been useful to hear the reasoning behind this specific timeframe.
The authors are credible scholars. Eyal G. Frank is an alumni of Columbia Center for Environmental Economics and Policy and David S. Wilcove is a Professor of Ecology and Evolutionary Biology and Public Affairs and the High Meadows Environmental Institute. The authors thank the High Meadows Foundation for its support of this article, but it is unclear whether this support was in the form of financial sponsorship.
Frank, E. G. and Wilcove, D. S. (2019) ‘Long delays in banning trade in threatened species’, Science, vol. 363, no. 6428, pp. 686-8.