This piece is based on two talks I gave in the spring of 2005 -- one at the O'Reilly ETech conference in March, entitled "Ontology Is Overrated", and one at the IMCExpo in April entitled "Folksonomies & Tags: The rise of user-developed classification." Th
H. Zhang, M. Korayem, E. You, and D. Crandall. Proceedings of the Fifth ACM International Conference on Web Search and Data Mining, page 33--42. New York, NY, USA, ACM, (2012)
L. Zhang, J. Tang, and M. Zhang. Proceedings of the 14th Asia-Pacific International Conference on Web Technologies and Applications, page 354--365. Berlin, Heidelberg, Springer-Verlag, (2012)
G. Zhong, L. Wang, and J. Dong. (2016)cite arxiv:1611.08331Comment: About 20 pages. Submitted to Journal of Finance and Data Science as an invited paper.