"Ricardo's Difficult Idea" is an essay that provides a good online education in economics and why trade makes everyone richer, as demonstrated not just by histo

"Ricardo's Difficult Idea" is an essay that provides a good online education in economics and why trade makes everyone richer, as demonstrated not just by history but also by mathematics. http://web.mit.edu/krugman/www/ricardo.htm http://web.mit.edu/krugman/www/ricardo.htm