Zhang Yiwen

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This paper studies the relation between analyst optimism and individual stock price crash, and whether the conflict of interest affects the relation. Examining a comprehensive sample of listed companies between 2007 and 2012 in Shanghai and Shenzhen A-share stock market in China, we provide strong evidence that analyst optimism is positively associated with(More)
University administration is the main force of the science and technology innovation for a country. Scientific and rational assessment of universities' independent innovation ability of science and technology is related to ability of universities' independent innovation of science and technology development, nurture and motivation. This article studies(More)
Product diffusion research has a very important strategic significance in supporting the manager's decision-making in the enterprises, and has far-reaching effects in the products' R&D, popularizing, and updating processes. This paper reviews the domestic and abroad literatures in product diffusion field. The existing diffusion models, the research(More)
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