企业竞争文化与股价崩盘风险

本文以2010—2017年沪深两市非金融类上市公司为样本,基于上市公司的年报文本,采用文本分析法,构建衡量企业竞争文化的指标,并研究企业竞争文化对于股价崩盘风险的影响。研究结果表明,企业在年报中越强调竞争,股价崩盘风险越大。在采用双重差分法及工具变量法解决可能存在的内生性问题后,结论依然稳健。机制检验发现,企业内部有意识的文化建设及机会主义行为是影响股价崩盘风险的潜在渠道。进一步的研究表明,竞争文化的作用强度受到行业竞争力、员工裁员压力及代理问题的影响。本文不仅从企业文化的微观视角丰富了股价崩盘风险影响因素的研究,为文化金融提供了新的微观经验证据,而且为市场各方洞悉独特的企业文化对金融市场稳定的规制作用提供实证参考。     

大豆期货市场有效性的多维度分析

基于期货市场功能与期货市场有效性内在关联的视角,选取了相关性指标、Granger因果检验、GS模型检验和信息份额模型作为价格发现功能评价方法;基差分析、套期保值绩效值分析、套期保值比率分析和成交量分析作为套期保值功能评价方法,对我国大豆期货市场的有效性展开了多维度分析。研究认为我国大豆期货市场是弱式有效的,仍然有很大的提升空间,可以从完善期现货主体的建设、完善期货实物交割体制,降低交易成本、推进期货市场国际化等方面进一步加强期货市场的建设,进而保证我国粮食安全。     

Estimating class-specific parametric models using finite mixtures: an application to a hedonic model of wine prices

Hedonic price models are commonly used in the study of markets for various goods, most notably those for wine, art, and jewelry. These models were developed to estimate implicit prices of product attributes within a given product class, where in the case of some goods, such as wine, substantial product differentiation exists. To address this issue, recent research on wine prices employs local polynomial regression clustering (LPRC) for estimating regression models under class uncertainty. This study demonstrates that a superior empirical approach – estimation of a mixture model – is applicable to a hedonic model of wine prices, provided only that the dependent variable in the model is rescaled. The present study also catalogues several of the advantages over LPRC modeling of estimating mixture models.     

中美两国价格水平差异的比较研究

基于两种不同类型商品和服务价格数据,研究测算出中美两国价格水平差异程度有所不同。非参数检验和非相似度指数研究表明,对代表性商品而言,中国价格水平低,与美国有显著差异;对同质可比商品而言,中国价格水平接近于美国,部分商品价格甚至高于美国。中美两国价格水平差异总体呈缩小趋势。研究发现,人民币汇价对两国价格水平差异具有一定的传导弹性作用,并且人民币升值的传导作用要大于人民币贬值的传导作用。     

人民币国际化:影响因素、政策配合与监管

随着中国经济的快速发展和对外开放程度的提高,人民币逐渐走出国门,被其他国家所接受,人民币国际化成为必然趋势,人民币在国际货币体系中将发挥更为重要的作用.文章对货币国际化的影响因素进行了实证分析,结论认为经济基本面、金融深化、币值稳定和网络外部性对货币的国际储备份额具有重要的影响.基于此,分析了人民币国际化可行性,并进一步讨论了人民币国际化与货币政策、汇率政策之间的配合,以及人民币国际化进程中的监管问题.     

2016年国际原油价格分析与趋势预测

在回顾2015年国际原油市场主要发展历程的基础上,从两方面对2016年油价走势进行了发展态势展望和预测分析。研究认为:受全球经济形势、供需基本面因素的主要作用,在产量相对过剩情况下,尽管2015年油价已经下跌至成本价水平,但2016年油价整体还将呈现下降态势或将持续在低位震荡。预计2016年Brent、WTI原油均价为40~50美元/桶,并且两市明显价差将消失。     

2016年石化产业前景预测与展望

通过对2015年石化产业的发展进行回顾,分析2016年影响石油生产行业、油服行业、炼油与化工行业、储运销售行业及一体化公司业绩的因素变化情况,据此对2016年石化产业的前景作出预测:受累于低油价,石油生产行业承压;油服行业保持盈利,但增速放缓;炼油与化工行业可抓住机会,实现盈利;储运销售行业业绩可实现稳中有升;一体化公司缘于业务差异,分化会更加明显。     

机构投资者行为对信息效率的影响研究

中国机构投资者在过去十几年规模和数量都取得了快速发展,但其在资本市场中扮演什么样的角色一直没有定论.通过考察2006-2014年机构投资者持股和交易行为,研究发现我国股票市场整体股价同步性偏高,机构投资者持股比例高的股票股价同步性更低,而机构投资者交易的增加却未能降低股价同步性.机构持股和机构交易对股价同步性的影响机制和对不同规模的股票影响不尽相同,通过进一步考察不同类型机构投资者行为对股价同步性的影响,发现各类型机构投资者影响存在差异,其中信托、养老基金和QFII的持股和交易行为都会降低股价同步性,有利于市场信息效率的提高.为了维护资本市场稳定和提高市场效率,应在继续大力发展机构投资者的同时改善机构投资者结构并优化基金经理业绩考核体系.     

The Role of Contract Negotiation and Industry Structure in Production Outsourcing

Despite the spread of cost‐driven outsourcing practices, academic research cautions that suppliers' cost advantage may weaken manufacturers' bargaining positions in negotiating outsourcing agreements, thereby hurting their profitability. In this study, we attempt to further understand the strategic impact of low‐cost outsourcing on manufacturers' profitability by investigating the contractual form of outsourcing agreements and the industry structure of the upstream supply market. We consider a two‐tier supply chain system, consisting of two competing manufacturers, who have the option to produce in‐house or to outsource to an upstream supplier with lower cost. To reach an outsourcing agreement, each manufacturer engages in bilateral negotiation with her supplier, who may be an exclusive supplier or a common supplier serving both manufacturers. Our analysis shows that wholesale‐price contracts always mitigate the competition between manufacturers regardless of whether they compete with price or quantity. In contrast, two‐part tariffs intensify the competition when the manufacturers compete with quantity, but soften it when they compete with price. As a result, when outsourcing with two‐part tariffs, the manufacturers may earn lower profits than they would from in‐house production, although the suppliers are more cost efficient. This suggests that managers have to be wary about the downside of using coordinating contracts such as two‐part tariffs when pursuing low‐cost outsourcing strategies. Our analysis also sheds some light on the profitability of using an exclusive supplier for outsourcing. When outsourcing with wholesale‐price contracts, the competing manufacturers are better off outsourcing to an exclusive supplier. However, when outsourcing with two‐part tariffs, the manufacturers may earn higher profits by outsourcing to a common supplier than to an exclusive one when the manufacturers' bargaining power is sufficiently strong (weak) under quantity (price) competition.