Bakshy, Eytan, Matthew Simmons, David Huffaker, Chun-Yuen Cheng, and Lada Adamic. 2010. “The Social Dynamics of Economic Activity in a Virtual World”. Proceedings of the International AAAI Conference on Web and Social Media 4 (1):2-9. https://doi.org/10.1609/icwsm.v4i1.14032.