Krugman's column on Greece and Mankiw's response

Krugman's excellent column on Greece

http://www.nytimes.com/2010/05/07/opinion/07krugman.html

and Mankiw considers this column "thoughtful and thought-provoking".

Mankiw responses to this, challenging the idea of centralized fiscal authority (by comparing Greece and Germany to California and Washington). He askes " Does a common currency area need a centralized fiscal authority?"

http://gregmankiw.blogspot.com/2010/05/does-currency-area-need-fiscal.html

Then Krugman reacts to Greg's question!

http://krugman.blogs.nytimes.com/2010/05/07/a-cross-of-gold/

One of his previous summary of the debt crisis and the euro can clarifies a bit about his view.

http://www.nytimes.com/2010/04/30/opinion/30krugman.html?partner=rssnyt&emc=rss