本文从理论和经验两个维度探讨，经济转型背景下，宏观外生冲 击对我国上市公司融资选择和资本结构调整行为的影响。本文建立的资本结构动 态调整模型表明，信贷市场及股权再融资市场上配额性指标和成本性指标的变 动，作为外生的宏观冲击，对企业股权债权融资选择及以此形成的资本结构具有 重要影响。本文利用1999-2008 年沪深两市900 家上市公司的非平衡面板数据所 做的经验研究证实，经济环境及宏观政策的波动通过改变企业面临的信贷环境和 股权再融资环境进而影响资本结构的动态调整。这种影响对不同融资约束程度的 企业存在差异。对于存在融资约束的企业，资本结构的调整更多地受到信贷、股 权再融资配额性指标的刚性制约；不存在融资约束的企业对成本性指标的变动更 为敏感。

虽然理论上认可在经理人股权激励中引入相对业绩评价有助于增进其激励效应， 但经验证据一直不足。而我国上市公司近年来的经理人股权激励实践为此提供了研究机会， 本文就利用此方面的相关数据来研究在经理人股权激励中引入相对业绩评价对股东财富增 长的影响。结果发现：资本市场对于经理人股权激励计划草案公告有显著为正的累计超额回 报（CAR），股权激励计划能给投资者带来正的财富效应；经相对业绩调整后的行权业绩条 件指标与CAR 显著正相关，但经理人股权激励计划中的激励计划有效期、股权激励力度、 激励对象是否包含董事长等要素特征对CAR 没有显著影响。本文的发现意味着，在经理人 股权激励中引入相对业绩评价确实有助于股东财富增长。

本文从控制权、金融危机角度考察了我国制造业上市公司投资与现金流的关系，基于模型参数估计和残差构造了投资现金流敏感度指标，将样本进一步分为正敏感型、不敏感型和负敏感型三类并进行了组间比较。实证结果显示：正敏感型企业并不是绝大多数，负敏感型企业规模最小、控制权及由此产生的利益侵占较低、危机前投资率最低、危机后市场表现最好；金融危机通过资本市场和其他因素作用于企业投资，对中国制造业企业的影响巨大。与以往考虑所有权的模型相比，基于控制权的模型在常态下具有更高的有效性，根据其划分的三类企业各项指标的组间比较结果更显著。

本文以2005年以后我国证券市场的公开市场流通股股份回购为研究对象，着重于动机研究。我们发现存在两种类别公司。一类公司的宣告动因即真实动因，回购公告中的信息含量符合价值低估假说、财务灵活性假说和自由现金流假说等。另一类公司的回购宣告动因不全面，存在隐藏动因，甚至宣告动因本身并不真实。针对我国上市公司股份回购动因的差异化，我们进而提出了政策建议。

根据中国特殊的二元股权结构，在公司特征变量（公司规模、投资机会、盈利能力）的基础 之上，加入描述资本结构和股本结构两个变量，同时在控制变量中加入描述特质风险的变量，通过 Logistic 回归发现，六个变量均对中国现金股利政策有显著影响，且规模越大、盈利能力越好的上市 公司越倾向于支付现金股利，而投资机会越多、资产负债率越高、流通股比率越大、特质风险越大 的上市公司越不倾向于支付现金股利。将考虑特质风险的股利支付倾向变动和投资者偏好进行线性 回归，结果表明，当特质风险被控制后，中国上市公司的现金股利政策迎合投资者偏好。

本文以中国国有控股上市公司民营化并形成民营股东控股、但股权制衡结构不同 的公司为样本，研究不同性质的制衡股东是否具有不同的制衡效果，以及民营控股股东政治关系 对制衡效果的影响。本文发现，与一股独大公司相比，国有股东制衡公司更可能被控股股东掏空， 民营股东制衡公司更不可能被控股股东掏空。说明不同性质的制衡股东具有不同的制衡效果。本 文还发现，有政治关系的民营控股股东更可能掏空。

We examine the dynamic adjustment of cash holdings of publicly traded Chinese firms over the period 1998-2006. The empirical evidences are supportive of the dynamic trade-off theory of cash holdings. Importantly, there is strong evidence to support asymmetric adjustments. That is, the adjustments from above the target are significantly faster than adjustments from below. In addition, adjustment speeds are heterogeneous for firms facing differential adjustment costs. In particular, adjustment speed is negatively related to firm size, but positively related to the deviation from the target. Furthermore, in terms of adjustment method, Chinese listed firms make adjustments to their targets primarily through internal financing, while debt financing and dividend payment play a minimal role. Finally, we find that the precautionary motive arising from financial constraints explains the cash holdings adjustment behaviors of Chinese Listed firms well.

The paper studies the effect of social capital on the firms’ debt capacity and capital structure in China. We measure the social capital of China’s 31 provinces through four indexes: the number of NGOs per capita, the index of trust among peoples, the volunteer blood donation ratio of civics, and the money and material donation of civics. The results show that in those areas with more social capital, the firms are more likely to have higher debt ratio and longer debt maturity, and the firms can get debt financing with less tangible assets. And in those districts, the firms are easier to obtain bank credits and trade credits. The paper has two contributions to the economics literature: first, it confirms the economic value of social capital from a micro view; second, it provides a new perspective to understand the firms’ capital structure choice.

Multiunit structure can internalize the managerial market to promote competition among subsidiary managers, and create an internal capital market within firms to alleviate external financing constrains, and it also may lead to diversification to lower the operation risk and regulation. While it brings in more agency problem created by subsidiary managers, causing the efficiency of internal capital market and diversification confusing. Using the data of listed firms in China, an emerging market, this paper examines the efficiency of multiunit structure within the firm, investigating the influence on capital allocation and firm performance. We find that multiunit structure is better in emerging market since it is efficient in capital allocation, reducing the inefficient investment by reducing the overinvestment and alleviating the underinvestment, and the bright side of multiunit structure dominates the agency problem associated, thus beneficial for firm performance, both short-term and long-term accounting returns. In less developed capital market under current situation, multiunit structure is better.

The long-run underperformance of the initial public offerings is one of the three hot issues in IPO research area,until 2000,the scholars in China began to research it,hence,the related theory is far from absent,therefore,many theories need to be completed. The article studied the long-run performance of 174 shares issued in Small and Medium-sized Board from the day after the first trading day to three years.It found that the shares show underperformance since the first month after its going to public,which will continue to the second year.But the shares showed strong performance compared with the Shenzhen A-share Composite Index.