The Canadian economy is a very interesting one. According to the US State Department, the two countries share the longest international border between two countries on the planet, one would naturally conclude that they share close economic ties, and indeed they do. About $1.8 billion (USD) of goods and services cross the border every day. The two countries work closely on issues ranging from security, law enforcement, environmental protection, etc. About 380,000 cross the border every day to work, vacation, shop, etc.