exporting country (origin)
importing country (destination)
iso3 origin
iso2 origin
iso3 destination
iso2 destination
GDP of the destination, in million dollars
population of the destination
GDP of the origin, in million dollars
population of the origin
1 for contiguity
1 for common official of primary language
1 if a language is spoken by at least 9% of the population in both countries
1 for pairs ever in colonial relationship
1 for common colonizer post 1945
1 for pairs currently in colonial relationship
1 for pairs in colonial relationship post 1945
1 if countries were or are the same country
simple distance (most populated cities, km)
simple distance between capitals (capitals, km)
weighted distance (pop-wt, km)
weighted distance (pop-wt, km) CES distances with theta=-1
1 if origin country is in EU28
1 if destination country is in the EU