Telecommunications Investment:Infrastructure,Network Effect and Regional Disequilibrium
luo yuze1; rui mingjie2; luo laijun3 and zhu shanli4(1.china academy of telecommunications research of mii and guanghua school of management; peking university; 2.management school; fudan university; 3.economics school; renmin university of china; 4.guanghua school of management; peking university)