Do goodwill impairments affect audit opinions? Evidence from China

There has been a steady growth of goodwill impairments in the Chinese stock market since the adoption of the impairment approach in accounting. The influence of goodwill impairments on a firm’s financial position and profitability give reason to doubt its current and future performance. We examine whether auditors, as a crucial external monitor, identify the information risks of goodwill impairments and express their concerns about financial reporting quality in their audit opinions. Using a sample of firms listed on China’s A-share market from 2007 to 2017, we test the association between goodwill impairments and the type of audit opinion received in the same financial period. Our findings are as follows. First, the probability of receiving a modified opinion increases with the amount of goodwill impairments. Second, the positive association between goodwill impairments and modified audit opinions is driven primarily by earnings management risks. Third, this positive association is more salient when auditors are industry experts and there is no auditor–client mismatch. Fourth, auditors are more sensitive to the amount of goodwill impairments than to their mere existence. Overall, we document that auditors perceive goodwill impairments as a signal of information risks and communicate their concerns to investors to avoid litigation.     

Aggregate insider trading and market returns: The role of transparency

Using a sample of countries that require timely disclosures of insider trades, I investigate the effect of country‐level institutions that promote transparency on the extent to which aggregate insider trades predict market returns. I find that financial information transparency mitigates the predictive content of aggregate insider trades when markets are more likely to deviate from fundamentals (i.e., during market fads), and when there is greater co‐movement in stock prices. In contrast, there is some evidence that governance and investor protection mitigate the association between aggregate insider trades and future earnings surprises. Hence, holding constant the timely disclosures of insider trades, other capital market institutions play complementary roles in mitigating the informational frictions that give rise to the predictive content of aggregate insider trades.     

A Note on a Framework for Valuation Ratios Based on Fundamentals*

Valuation ratios divide stock price by accounting metrics such as earnings, earnings growth, and book value. This study adapts the general valuation framework in Ohlson and Juettner-Nauroth (2005) and Ohlson (2005) to present a unified approach for developing valuation ratios based on fundamentals, referred to as fundamental valuation ratios. One starts with a valuation model that is driven by an accounting metric a and its abnormal growth, then divides the valuation model by a to get a fundamental valuation ratio. For any valuation ratio, one can find a corresponding fundamental valuation ratio, as long as the valuation model is based on the same metric a as the valuation ratio denominator.     

铬掺杂对硅酸铁锂电学性能影响的计算机仿真研究

硅酸铁锂是一种锂离子电子的正极材料,由于其晶胞在理论上可允许可逆脱嵌两个锂原子,使得其理论比容量有巨大的提升空间,加上原料易得、无污染及成本低的优势,受到了人们的重视。正极材料掺杂被认为是改善其导电性能的有效途径。论文通过运用基于第一性原理方法的计算机仿真技术,对铬掺杂硅酸铁锂的结构和导电性能的影响进行了计算机仿真研究,结果表明未掺杂的硅酸铁锂其带隙快读为2.44eV,掺杂铬之后硅酸铁锂带隙减小为2.31eV,表明铬掺杂可提高硅酸铁锂的导电性能。     

高职计算机教学的心得体会

根据职业教育发展的需要，提高职学生的计算机素养，促进高职学生综合素质已是刻不容缓之事。但是，高职学生基础差，学习兴趣冷淡。本文先分析学情，然后给出了应对之策。用以激发学生的学习兴趣，提高教学效果。     

基于Stacking模型融合的店铺销量预测

为了实现企业产品销量预估,提高生产供应的准确性与效率,提出了基于Stacking模型的融合算法进行销量预测。算法设计了两层堆叠的模型结构,初级学习器采用随机森林、支持向量回归、差分整合移动平均自回归、轻量级梯度提升机器和门控循环单元5种单模型,将分类与回归树作为次级学习器构成Stacking融合模型,并对数据进行了预测。预测结果显示,使用Stacking模型融合后得到了较好的预测结果,比单模型中效果最好的模型的均方根误差更小,平均绝对误差更小,决定系数值更大,表明Stacking融合模型的预测准确率更高。所设计模型可用于对企业店铺的产品销量进行预测,帮助企业更好地安排生产、营销活动,为减少库存、缩短生产销售周期提供数据支持,对企业生产决策有一定的参考价值。     

关于高校电子商务专业课程设置的思考

本文探讨了当前高校电子商务专业的设置问题,指出计算机和网络课程应该是专业课程体系的核心。然后,本文详细叙述了相关计算机和网络课程的背景和主要内容,并提出了应该开设哪些文科课程的建议。     

高职会计电算化专业的职业技能培养、训练与测评

按高职会计电算化专业技能的特点和性质要求,培养和发展学生的就业与工作能力,只传授专业理论知识是远远不够的,必须把专业基本知识的教学和基本技能的训练结合起来。技能训练可采用课堂讲授法、课后作业法、摸拟训练法、课外辅导法和社会实践法等技能训练方法。并设计采用相对简化的测评方法对学生学习各项技能的正确性和熟练程度进行测评。     

互联网商业生态系统动态演化仿真研究——以阿里巴巴为例

文章尝试将商业生态系统理论与互联网相结合，解释互联网商业生态系统内部结构的静态和动态演化过程，从理论上深度探索了互联网商业生态系统内部生态发展的内在机理和运行机制，并运用计算机仿真方法模拟了互联网商业生态系统的内部演化过程。研究发现：互联网生态结构的演化过程经历了萌芽期、成长期、繁殖期、分化期四个主要阶段，商圈发展经历了平台、商家、消费者三主体到平台、商家、消费者、专业服务商、增值服务商五主体的进化过程，并不断进化和繁殖生成新的专业服务商和增值服务商，随之产生新的互联网商业生态系统。最后，文章以阿里巴巴电子商务生态系统为案例从经验上对其内部生态系统的发展和演化构成进行了分析。     

计算机网络与现代物流

现代物流作为现代科技进步的产物,正促进物流业朝着高效、快捷、低成本的配送体系进一步扩展。计算机在物流信息管理中的应用为其提供了广阔的发展空间,本文从现代物流与计算机网络入手,详细阐述了现代物流的发展与计算机网络在物流方面的应用等内容。