资产证券化中信用评级机构道德风险研究——基于演化博弈分析

首先针对信用评级机构在资产证券化中的重要作用,分析了信用评级机构道德风险对资产证券化产生的不良影响,并由此论述了信用评级机构的道德风险产生原因;其次通过构建信用评级机构博弈支付矩阵,运用演化博弈论对评级机构的演化趋势做出分析,得到其演化的三种不同的稳定策略;最后从建立声誉机制、保证评级机构独立性、加强监管力度三个方面给出政策建议。     

The impact of customer-generated evaluation information on sales in online platform-based markets

As the online platform-based market expands, research into the impact of consumer-accessible information in this market on performance has received significant attention in recent years. In this study, we focus on customer-generated evaluation information (CGEI). The purpose of this study is to demonstrate the effect of CGEI—both quantitative (i.e., star rating, star rating volume) and qualitative (i.e., customer review content) aspects—on actual sales in an online platform-based market. We analyze the regression of quantitative GCEI on sales and for qualitative GCEI we apply the Latent Dirichlet Allocation (LDA) topic modeling. We discover that star ratings do not always lead to increased sales, implying that star ratings and sales have an inverted U-shaped relationship. Furthermore, the results demonstrate that star rating volume has a positive effect on sales. We reveal that the review contents of product quality and added value have a positive effect on sales, whereas those of seller service have no effect on sales. This study provides some insight into how customer-generated information can increase actual sales in online platform-based markets.     

公开发行债券能提高企业创新产出吗？

以2006—2021年我国A股上市公司为样本，探讨了企业首次发行债券如何影响企业的创新水平。研究发现，企业首次公开发行债券能够显著提升企业的创新水平。机制分析结果表明,企业发行债券通过建立替代性融资渠道缓解融资约束，延长整体债务期限，提高信息披露水平这三个路径来提升企业创新水平。进一步研究发现,在控制了企业后续发债行为后，公开发行债券与企业创新的关系仍然存在；相比于公司债，企业首次发行债券种类为中期票据和企业债时，企业创新水平提升更显著；企业首次发行债券时，债券信用评级越高、发行利率越低，对于企业创新水平的提升越显著。研究结论丰富了债券市场经济后果的研究，也为企业创新发展和实现经济高质量发展提供了来自债券市场的建议。