融资约束对企业出口影响的Heckman验证-基于银行信用风险的视角

基于中国工业企业数据库1998-2014年7032家企业的平衡面板数据,从银行信用风险内部评级的视角,研究融资约束对企业出口的影响.结果表明:银行信贷融资约束与企业的出口决策及出口强度间有显著负相关关系.同时,使用Heckman二阶段模型研究发现:不同形式的商业信用对企业出口决策及出口强度的影响和作用机制会因企业所处供求端位置的不同而存在差异.其中,需求端的商业信用仅与企业出口决策显著正相关,而与出口强度的相关性并不显著;供给端的商业信用则与企业出口强度显著负相关.     

Short‐selling constraints and corporate payout policy

This study shows that managers adjust corporate payout policies to counteract intensified short‐selling pressures following the removal of a short‐selling constraint. We use a controlled experiment, the Regulation SHO pilot program, to find that changing the short‐selling rule brings small companies to increase cash dividends, but not to repurchase more shares. Because paying dividends is costly, it is acknowledged as a more reliable signal of stock undervaluation than share repurchase. While our evidence suggests that companies select this payout strategy to deter predatory short sellers, it also shows that a short‐selling activity has a causal effect on corporate payout decisions.     

卖空者与内幕交易——来自中国证券市场的证据

本文研究上市公司内部人减持、年报、诉讼、分析师评级、停复牌以及高送转等重大公告前后卖空交易行为的变化,系统考察卖空者是否参与内幕交易以及何种因素影响卖空者参与内幕交易,发现卖空率较高的股票具有较低的未来收益,表明卖空者拥有信息优势,属知情交易者;卖空者拥有非常精确的择时交易能力,在重大利空公告前显著增加卖空量,而在利好公告前则显著减少卖空头寸,表明卖空者作为知情交易者的信息优势源自内幕消息;公司内、外部投资者的信息不对称程度越低或公司所在地的法治水平越高,卖空者参与内幕交易的行为就越少。因此,监管机构应密切关注公司重大消息发布前后卖空量的异常变动,同时,完善信息披露规则、健全证券分析师制度并强化法律法规的执行力度,才能有效防范卖空者参与内幕交易。     

环境执法监督对企业绿色创新的影响

以环保约谈制度实施为契机,基于合法性理论和遵从理论,考察环境执法监督对企业绿色创新的影响及其机制。研究发现：环境执法监督会有效地促进企业绿色创新,即环保约谈显著地提高了被约谈地区企业的绿色创新水平。拓展性检验与分析后发现,环境执法监督对企业绿色创新的促进作用主要表现在低融资约束企业和低代理成本企业中。影响机制探索后发现,环境执法监督通过提高企业环境成本、环境处罚力度和企业环保投资,进而促进企业绿色创新。     

Optimal mixed taxation,credit constraints,and the timing of income tax reporting

We study optimal income and commodity tax policy with credit‐constrained low‐income households. Workers receive an even flow of income during the tax year, but report their incomes and make tax payments (receive transfers) at the end of the year. They spend their disposable income on multiple commodities over the year. We show that differentiated subsidies on commodities can be optimal even if the Atkinson–Stiglitz Theorem conditions apply. When the optimal policy leaves low‐income households with binding credit constraints, it may be optimal to subsidize differentially the good that they consume in higher proportion. Uniform subsidies would also relax the credit constraint, but would be more costly to the government since they would equally benefit unconstrained households. Numerical examples suggest that commodity tax differentiation increases with basic needs and with the interest rate at which government borrows.     

Optimal selling mechanisms for multiproduct monopolists: incentive compatibility in the presence of budget constraints

We analyze the nonlinear pricing problem faced by an incomplete information monopolist operating in a market populated by agents with budget constraints. We show that if other goods are available and if the monopolist's goods are nonessential relative to other goods, then there exists an optimal, individually rational, and incentive compatible selling mechanism for the monopolist (Theorem 1). Moreover, we show that a solution to all such nonlinear pricing problems exists if and only if the monopolist's goods are nonessential (Theorem 2). In the absence of nonessentiality, we show that if the monopolist's profit function is independent of quantity (e.g., if all costs are fixed), then an optimal selling mechanism exists (Theorem 3). Finally, we show that if there is reporting (of types by agents) and partial recognition of types (by the monopolist), then an optimal selling mechanism exists, even in the absence of nonessentiality, provided agents' utility functions are affine and continuous in goods (Theorem 4).     

短波跳频电台的发展趋势

本文根据短波跳频电台的发展趋势，重点分析了研制短波数字跳频电台所涉及的若干关键技术问题。     

ESG表现与企业金融化——内外监管双“管”齐下的调节效应

以2011—2018年A股非金融、非房地产上市公司为样本,探讨环境、社会责任及公司治理（ESG）表现对企业金融化的影响效应。研究表明：ESG表现抑制了企业金融化,而企业内部监管会放大ESG表现对企业金融化的负向效应,外部金融监管则弱化了两者之间的负向关系。抑制效应、放大效应和弱化效应在环境、社会责任方面体现较为明显,而在公司治理方面不明显。进一步研究发现,ESG表现以及环境、社会责任能通过融资约束抑制企业金融化行为,融资约束在公司治理对企业金融化的影响中不具有中介作用;异质性分析发现ESG表现以及环境、社会责任对企业金融化的抑制效应在国有企业、研发能力较强企业中较为显著,而公司治理在非国有企业和研发能力较强的企业中表现出正向的金融化效应。研究结果丰富了ESG表现影响企业金融化的理论机制,为完善上市公司监管制度体系、夯实实体经济发展根基提供了依据。     

关于中小企业融资难、融资贵问题的思考

中小企业融资难融资贵是个世界性难题,我国的中小企业融资难融资贵问题则又带有鲜明的中国特色。中小企业天生具有融资难和融资贵的特点,信息不对称更会加剧此问题。无论是发达国家还是发展中国家都将解决中小企业融资难融资贵问题提升到战略高度给予重视,也构建了各具特色的政策扶助体系,力图弥补市场机制的缺陷。我国应借鉴国外的成熟经验,并结合国内金融改革的路径、金融市场发展的思路以及实体经济发展的总体特点,制定一个兼顾短期、中期和长期的发展战略,从法治、产业、财政和金融等多方面对中小企业融资环境进行综合改革。