- Kublai Khan created the first paper currency and bought everything with it... http://afe.easia.columbia.edu/songdynasty-module/econ-rev-money.html 16 comments economics
- a short article about the Debate on Salt and Iron that took place during the Han dynasty. http://afe.easia.columbia.edu/ps/cup/debate_salt_iron.pdf 3 comments philosophy