[3] viXra:1807.0078 submitted on 2018-07-03 23:48:59, (172 unique-IP downloads)
Authors: Nuan Lu, Wanxian Li
Category: Economics and Finance
[2] viXra:1807.0073 submitted on 2018-07-03 23:58:34, (172 unique-IP downloads)
Authors: Yang Mengjie, Wanxian Li
Category: Economics and Finance
[1] viXra:1807.0072 submitted on 2018-07-04 00:01:22, (158 unique-IP downloads)
Authors: Yawei Song, Wanxian Li
Category: Economics and Finance