Please read the below NYTimes article by Paul Krugman who received the Nobel Prize in 2008.
He compares and contrasts 4 countries: U.S., Canada, New Zealand, and Australia in terms of the circulation of their currency (Dollar but not the US Dollar) and its implications in terms of international trade and domestic economy.
Discuss the importance of using a national currency, its implications, similarities and differences of these countries, similar examples from around the world, and the main idea of the article in the light of our in class discussions.