Table 5.

Variable description and sources

Variable	Description	Source
Dependent variables
$X_{\mathit{ijst}}$	Volume of potential zoonotic disease traded in species s between exporter i to importer j in year t.	Johnson et al. (2020) and CITES
Independent variables
CITESapp${}_{\mathit{ist}}$	Dummy variable = 1 if the species is listed in the Appendix I of the CITES agreement; 0 if the species is listed in Appendix II.	UNEP-WCMC (Comps.) (2020)
Specimens${}_{\mathit{ist}}$	Dummy variable = 1 if the species traded is classified as “scientific specimens”; 0 if the species is not a scientific specimen.	UNEP-WCMC and CITES
RTA${}_{\mathit{ijt}}$	Dummy variable = 1 if a regional trade agreement between the two trading partners is in force in year t, 0 otherwise.	Egger and Larch (2008)
Corruption${}_{\mathit{it}}$	Indicator variable, which captures perceptions of the extent to which public power is exercised for private gain, including both petty and grand forms of corruption, as well as “capture” of the state by elites and private interests with higher values indicating higher level of perceived corruption.	Word Governance Indicators