作为中国资本市场开放的重大制度创新，陆港通交易制度在微观层面的政策效应一直是学术界关注的重要问题。内地资本市场引入境外投资者过程中，既可能因优化公司治理机制而抑制非金融企业的“脱实向虚”趋势，亦可能因加剧管理层对短期利益的跟风追逐而加剧了企业金融化。本文以陆港通交易制度的实施为准自然实验，构建错层外生情景的双重差分模型，探讨资本市场开放对企业金融化的影响。研究发现：（1）资本市场开放能够通过完善公司内部治理效应和加强外部威慑效应抑制企业金融化；（2）进一步分析发现，对于股权制衡度较低、未交叉上市的公司，资本市场开放对企业金融化的抑制作用更加显著。本文的研究结论深化了资本市场开放对企业金融化抑制效应的认知，为资本市场交易制度对企业金融化行为的影响提供了一定的增量证据。

以往研究较少关注资本市场制度变革所发挥的宏观调控作用。本文以2014年新股定价制度调整为场景，考察发行市盈率管制对企业上市融资、再融资以及后续投资活动的影响。研究发现，发行市盈率管制导致公允估值较高的企业通过操纵股本规模、“压线”发行等方式减少上市时出售的股份，上市融资规模显著降低，但这些企业在上市三年内再融资的概率和规模显著上升。同时，发行市盈率管制显著降低了公允估值较高的企业在研发、并购等资金需求量大、风险较高项目上的投资支出。本文的研究表明，尽管企业会设法绕开政策的限制，但发行市盈率管制对企业整体的股权融资效率、重大投资活动都产生了显著的负面影响，而且，由于股权融资成本的上升，上市企业不得不放弃部分有价值的投资机会。本文的发现对监管机构全面理解新股定价制度的经济后果，从宏观层面平衡新股定价制度的利弊具有重要的参考价值。

探究法律制度变化对企业股价崩盘风险的影响，对中国金融市场发展以及《民法典》的完善具有十分重要的意义，由此运用双重差分法系统地考察担保物权制度改革对企业股价崩盘风险的影响。研究发现：担保物权制度改革通过减小企业的融资约束显著降低了股价崩盘风险。进一步通过三重差分法进行异质性检验结果表明，在法律制度环境较好、市场化进程较快、政府关系程度较强的地区，担保物权制度改革降低企业股价崩盘风险的作用相对更大。因此，法律制定者在进一步完善担保物权制度时，应当针对不同企业采取差别化措施，从而促进金融市场良性发展。

《公司法》第106 条规定，公司特别决议的形成必须经出席股东会议的股东所持表决权的2/3以上通过才具有效力，当公司某大股东持股比例达到1/3后，如果该大股东不投赞成票就相当于否决了特别决议事项，从而获得了股东大会特别决议事项的“否决权”。本文使用中国2007~2014年A 股上市公司数据，运用精确断点回归设计法进行拟随机实验，在有效控制大股东持股比例等混淆因素的基础上，实证检验了大股东“否决权”对代理成本的影响，较好地克服了内生性问题。研究结论认为：当大股东持股比例达到1/3 的临界值后，在特定多数规则的外生冲击之下，大股东的“否决权”使得代理费用显著下降了2.9~3.9 个百分点，代理效率显著提高了15.2~26.2 个百分点。最后本文进行了理论猜想，尝试对大股东“否决权”导致的代理成本下降和代理效率提高的内在机理进行了诠释。

We investigate whether suppliers value their clients’ ESG profiles in China, the largest emerging market featured with low ESG awareness and severe agency problems. We find a robust and negative impact of Chinese firms’ ESG scores on their access to trade credit. The 2SLS regression results based on the instrumental variable indicate that the impact is casual. Additionally, the impact is more pronounced for firms with higher agency costs, greater information asymmetry, and worse financial performance. These results suggest that suppliers in China view clients’ ESG engagement as costly investments caused by agency problems. Finally, we highlight the economic importance of the impact by showing that trade credit access helps Chinese firms decrease debt costs, increase trade credit supply to downstream firms, and promote R&D inputs.

In this paper, we use a distinct quasi-natural experiments to examine the effect of liberalization of the stock market on corporate environmental, social, and governance(ESG) disclosure quality. We find that the liberation of the opening of Shanghai(Shenzhen)-Hong Kong Stock Connect (SHSC) significantly and consistently improves ESG disclosure quality of listed companies, and this effect is most evident in environmental information disclosure. We then find that the SHSC can improve the quality of ESG disclosure of listed companies through “voting with feet” and “external supervision” effect. Furthermore, the effect is stronger in firms that are Non-SOEs and with low equity concentrations. Overall, our results suggest that the liberalization of stock market can improve the quality of companies’ ESG disclosure quality.

This study examines the effect of mandatory corporate social responsibility (CSR) on firm excess perks by exploiting China’s 2008 mandate requiring firms to disclose CSR activities with a difference-in-differences design. We find that firms mandated to report CSR experience a decrease in excess perks subsequent to the mandate. Our empirical results also reveal that the decrease in abnormal perks is more pronounced for firms with worse information environments and lower CSR disclosure quality, suggesting that mandatory CSR disclosure significantly reduces executive abnormal perks and restricts managers’ unethical behavior by improving the quality of the information environment for investors. Our main finding does not change using the subsample before 2012, indicating that the reduction of abnormal perks is driven by the enaction of mandatory CSR rather than the anti-corruption campaign started in 2012. The last but not the least, the reductions of excess perk consumption are primarily driven by non-SOE firms and competitive industries, and mandatory CSR firms are subject to a significant and stronger pay-to-performance, which again confirm the well-governed view of corporate social responsibility.

This paper finds that Chinese stocks rise in February instead of January. Further analysis shows that the February premium is attributed to the Chinese New Year. We propose an alternative explanation for this premium based on liquidity preference, i.e., investors prefer holding liquid assets before the holiday and illiquid assets after the holiday. We find a substantial decrease in monetary base and increase in market activity after the Chinese New Year. The empirical fact that the Chinese New Year effect is particularly strong for stocks with low institutional holdings also supports this hypothesis.

Using daily news tone data between 2017 and 2020, we examine whether news tones can predict stock returns in Chinese A-share market. We first document that the news tones significantly and positively predict the cross-sectional stock returns over next day and over the next 12-weeks. When we separate the news into online news and paper news, the online news exhibit strong predictive power for future returns, while the printed news only displays marginal predictive power. We hypothesize that the online news is more related to firm fundamentals, while the paper news is more linked to political aspects of firm information. Our results using earnings surprises and SOE subsamples provide supportive evidence for the hypothesis.

考虑企业价值进而股票收益中实物期权及其影响的部分，本文利用随机贴现因子法理论上探讨了CAPM 是线性定价模型的本质，并据此指出实物期权资产或其可能的非线性影响是导致 CAPM 模型失效的原因。进一步，利用 1998-2012 年间我国沪深 A 股上市公司的数据，根据 Fama-French 市值规模和账面市值比，以及企业所处行业构造投资组合，通过比较实物期权调整前和调整后组合预期收益-贝塔关系的差异，实证发现调整实物期权将使得 CAPM 有效。