Notes, Comments and Preliminary results Aug 19 2020 Chung-Hui Chou   Do Consumers Gain or Lose when Network Externalities Become Stronger?   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Sep 19 2007 Chung-Hui Chou   Partial Compatibility and Vertical Differentiation   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result