基于复杂网络的同业拆借市场特性研究——以金融危机时期（2007~2009年）数据为例

运用复杂网络的系统科学方法,选用2007~2009年金融危机期间我国同业拆借市场相关数据,构建相应的同业拆借网络对我国同业拆借市场进行实证研究。结果表明：我国同业拆借市场具有典型的小世界和无标度特性,同时,在应对金融危机过程中,同业拆借利率表现出基准利率所具有的市场性和稳定性特点。     

Institutional incentives and earnings quality: The influence of government ownership in China

We examine the effect of government ownership and its associated institutional incentives on firms’ earnings quality using a sample of Chinese firms during the transitional economy between 1998 and 2005 when state-owned and non-state-owned firms were traded in the stock exchanges. We find that, in China, state-owned firms exhibit a lower earnings quality property than non-state-owned firms. Particularly, state-owned firms have more earnings smoothing, more frequently managed earnings toward target, less frequent timely recognition of losses, and less value relevance, relative to non-state-owned firms. We also find that state-owned firms have significantly higher discretionary current accruals than non-state-owned firms. We conclude that the Chinese government, through its controlling ownership of state-owned firms, creates incentives and regulatory backing for self-serving purposes that negatively influence these listed firms’ financial reporting.     

Opaque financial reports and R2: Revisited

In this study, we revisit the link between R² (synchronicity) and earnings management (opacity) because of the importance of the ongoing debate on the relation between idiosyncratic risk and earnings management in the finance and accounting literatures. Hutton et al. (J. Financial Economics, 2009) provide evidence of a positive link between opacity and R². They interpret their finding to imply that firms with high R² (high synchronicity) have less firm-specific information impounded in their stock price. Our results for this relationship fail to unequivocally support the results reported in Hutton et al. (2009). We show that their results are not only time variant but also not robust to the alternative empirical technique recommended for panel data by Petersen (2009) and alternative estimation of discretionary accruals adjusted for firm performance prescribed by Kothari et al. (2005). We also find no support for a convex relation between idiosyncratic risk and opacity. The findings documented in this study substantially revise some of Hutton et al.'s findings in this important and growing area of research.     

考虑基准资产的动态投资组合选取

职业基金经理的目标经常是希望自己的投资组合以稳定的表现能够超越所某一基准资产或组合。因此本文给出一个考虑基准资产的动态均值——方差投资组合选取模型。假设状态之间的转移遵循马氏过程,给定状态转移矩阵,可以得到对风险资产最优投入的解析表达式。此表达式表明对风险资产的投入由三项构成,前两项是不考虑基准资产时对风险资产的投入,最后一项与基准资产有关;在基准资产上的权重由基准资产收益的大小来决定,与积极投资组合管理者的风险厌恶程度无关;随着风险厌恶程度的增加,管理者会减少在风险资产上的投入。数值分析显示考虑基准资产的投资组合是一个积极的投资组合。     

关联交易对上市公司盈余质量的影响分析——基于沪市A股上市公司的经验研究

随着国内资本市场的发展,关联交易的规模也在不断扩大,表现出交易频率高、涉及金额大的特点。关联交易具有正反两面的效应,即既可以降低交易成本、提高经营效率,又可以成为上市公司盈余管理的手段。本文主要从盈余动机的角度出发,以近三年沪市A股上市公司为研究样本,研究结果表明,我国上市公司的关联交易规模呈逐年上升趋势,且存在明显配股动机。关联交易会对盈余质量产生显著影响,且这种影响随关联交易规模的扩大表现出先上升后下降的的趋势。     

董事会监管下的高管变更对盈余管理的影响研究

以我国上市公司为样本,对董事会监管下高管变更带来的盈余管理行为进行研究。实证结果表明:高管变更当年存在调减盈余行为;董事会监管程度与高管变更的概率有相关关系;董事会监管能抑制高管变更时的盈余管理行为。因此,我国上市公司应注重董事会制度建设,强化董事会监管作用,以规范盈余管理行为,促进我国上市公司健康、有效的发展。     

The effect of the summer doldrums on the market reaction to earnings announcements

Hong and Yu (2009) document a significant decrease in trading volume and returns during the summer months. Given the tendency of noise traders to buy shares following both positive and negative earnings surprises (Lee, 1992), we hypothesize that reduced trading activity by noise-traders results in less of an earnings announcement premium during the summer. Consistent with our hypothesis, we find lower abnormal returns surrounding summer earnings announcements compared to non-summer announcements. We also find lower abnormal returns in the ten days prior to the announcement, consistent with less front-running by sophisticated investors. Finally, we show that these summer effects are stronger in recent years characterized by more online trading and greater noise trader participation.     

The valuation properties of earnings and book values reported under IAS,domestic GAAP and U.S. GAAP: Evidence from China,Hong Kong,Japan, Korea and Singapore

This paper examines whether earnings or book value is the dominant valuation accounting measure for companies reporting under alternative accounting standards — International Accounting Standards (IAS)/International Financial Reporting Standards (IFRS), U.S. Generally Accepted Accounting Principles (U.S. GAAP) or domestic accounting standards of China, Hong Kong, Japan, Korea and Singapore. Our sample consists of domestic firms in the five Asian countries and firms from these countries cross-listed in the United States as American Depositary Receipts (ADRs) from 2002 to 2011. For domestic firms, book value is more informative than earnings for firms from Hong Kong, Singapore, China, Japan and Korea during 2002–2011 although their accounting standards are influenced by different systems. For the ADR sample, book value is more informative than earnings for U.S. GAAP reporters and reconcilers during 2002–2007. However, earnings are more informative than book value for U.S. GAAP reconcilers from China. After 2007, ADRs in our sample from Hong Kong, Japan and Korea continued to file under U.S. GAAP. Some ADRs from China filed under U.S. GAAP and some filed under IFRS. Earnings are more informative than book value for IFRS users; however, book value has higher incremental value relevance than earnings for U.S. GAAP users. We contribute to prior research by providing evidence on the valuation properties based on accounting measures reported under different GAAPs for the Asian countries.     

The usefulness of operating cash flow and accrual components in improving the predictive ability of earnings: a re‐examination and extension

We examine whether the components of accruals and operating cash flows improve the predictive ability of earnings for forecasting future cash flows. Unlike most previous studies, we avoid data estimation errors and sample self‐selection bias because we exploit data from Australia where reporting of actual cash flow components had been mandatory since 1992. We show that accrual components and operating cash flow components together are more useful than (i) earnings, (ii) operating cash flows and total accruals and (iii) the combination of operating cash flows with accrual components in forecasting future cash flows. These results are robust to several contextual factors, including the length of the operating cash cycle, industry membership, firm profitability and firm size.     

Accounting Standards and Earnings Management: Evidence from China

This article examines the effect of an asset impairment–related regulatory reform on earnings management in China. Chinese Accounting Standard No. 8 (CAS No. 8), which prohibits the reversal of long‐lived asset impairments, was promulgated to constrain managerial opportunism with respect to previously recognized impairment loss reversal. CAS No. 8 forbids the reversal of long‐lived asset impairment losses only, while allowing the reversal of short‐term asset impairment losses. Based on a sample of China's A‐share listed companies on the Shanghai and Shenzhen Stock Exchange during the period 2001–2008, we reveal that managers use less current asset write‐downs and more reversals in the post–CAS No. 8 period. However, such reporting practices do not appear to be influenced by managerial incentives to avoid reporting losses and/or for “big bath” accounting purposes.