sDongMei ZHAO, is a professor of China Agricultural University, a visiting scholar of University of Colorado (USA), Her is also the head of Department of Information Management and E-Commerce in college of Economics and Management, as well as the deputy director of MBA Education Center, CAU. She is also the chairperson of Agricultural E-Commerce Teaching and Research Association, and the deputy director of Basic Theory Committee of the China Information Economics Society.

Her research interests include Agricultural E-Commerce and futures market. In recent years, more than 30 articles have been published in Information Economics and Policy, China Economic Quarterly and other significant domestic and international journals. Prof. Zhao takes charge of over 10 projects of National Natural Science Foundation of China (NSFC), the ministry of science and technology, Beijing science, and technology committee, and the State Administration of Foreign Experts Affairs (SAFEA) et al.

This speech reveals that parts of achievements about price variation in China¡¯s E-commerce markets is based on a data set which consists of 535 product items from 93 web sites. Statistics indicates that prices have not converged in China¡¯s E-commerce markets and that there is relatively more price variation in markets for cosmetics, compact discs, gifts and books. E-tailer¡¯s characteristics are significant determinants of product prices. These findings are consistent with studies of ¡°western markets¡± that e-tailer product offerings through the internet may not be the same, even when their underlying attributes are. On the other hand, it also demonstrates that ownership structure and ¡°location¡± are important sources of price differences between e-tailers.

Title:E-Consumer¡¯s Behavior and Counteracting mechanism under the Cyber ¡°Lemon¡±: Based on the View of Information Economics

Yong PAN, is a professor of information economics, dean of department of logistics and e-commerce, Henan University of Finance and Economics. He received his Ph.D. in 2004 from the School of Business, Remin University of China. Prof. PAN is a member of the International Society for the Systems Sciences. He is the standing member of Council of China Academic for Information Economics. He has visited and worked at Waseda University (Japan).

His areas of research area interests include information economics and e-commerce. Prof. PAN has published more than 70 papers on journals including Economic Research, Economics Information, and 11 of them are retrieved by SCI and ISTP. He has also published altogether 4 books and translation works. He was in charge of one Humanity Social Research Plan Fund project sponsored by Ministry of Education and participated in two projects of National Social Science Fund of China.

This speech illustrates the research achievements of quality-information asymmetries in E-commerce market. The ¡°lemon¡± problem which was proposed by the economist George Akerlof(1970), one of Nobel Economics Prize laureates in 2001,reflects the negative impact of transaction efficiency that result from quality-information asymmetries. Based on the ¡®lemon¡¯ model put forward by Akerlof, this paper builds an e-consumer¡¯s behavior model under the cyber ¡°lemon¡±. The model fully considers the differences between e-trader¡¯s quality- preference and the influence of continuous quality distribution on the market equilibrium in order to reveal characteristics of ¡°lemon¡± problem which are different from the physical market and its impact on consumer behavior. Using the data from www.taobao.com, this paper sets up an econometric model and demonstratively analyzes the function of quality-intermediary, credit evaluation system and reputation needed to counteract the ¡°lemon¡± problem, and discusses existing issues.

Title: Online Consumer Reviews: The Impact of Valence of on Consumer Decision Making Cross Different Products

Qiang YE, is a professor of Management Information Systems at Harbin Institute of Technology, Harbin China. He received his PhD degree in MIS from Harbin Institute of Technology in 2003. He had worked in the McCombs School of Business in University of Texas at Austin and School of Hotel & Tourism Management in Hong Kong Polytechnic University as post doctoral fellow and visiting scholar in past several years.