Year of observation
Country i, numeric
Country j, numeric
Country i, name
Country j, name
Bilateral trade between countries i & j as a share of country i's GDP (logged)
Distance between countries i & j (logged)
Shared border between countries i & j
Shared language between countries i & j
Population of country i (logged)
Population of country j (logged)
Area of country i (logged)
Area of country j (logged)
Length of country i's coastline (logged)
Length of country j's coastline (logged)
Interaction between border and area of country i (logged)
Interaction between border and area of country j (logged)
Interaction between border and common language