In this study only merchandise trade will be considered. This is partly due to data constraints, and partly because most services, especially those that can be delivered digitally, are assumed to be minimally affected by transportation disruptions.Footnote1 For both imports (upstream supply) and exports (downstream demand), this paper uses a customs-basis Canadian merchandise trade dataset from Statistics Canada for 2019 at the most detailed level of Harmonized System (HS) available, i.e. 10-digit codes for imports and 8-digit codes for exports. This dataset contains five dimensions that are useful for the study of GVCs: country of origin/destination, province of origin/destination, product, mode of transportation, and port of entry/exit; although, for our purposes we drop the country and province dimension.