Joint misrepresentation with bribes

We study the problem of assigning objects to buyers. Monetary transfers are allowed. Each buyer’s preference space contains, but is not limited to, the linear additively separable preferences. A rule maps each preference profile to an allocation. We are concerned about the possibility that a group of buyers may engage in the following kind of manipulation: They make side payments internally and then carry out a joint misrepresentation. A rule is strongly group strategy-proof if no group can gain by engaging in such operations. We also consider several other appealing requirements. We find that the posted-price rules are the only one that satisfies non-triviality, non-imposition, envy-freeness, and strong group strategy-proofness.     

融资惯性、控制权收益和民营化效率——基于星美联合的案例分析

文章通过研究星美联合股份有限公司(以下简称星美联合),发现国有企业民营化后,接手国有企业的民营企业仍能以较低的利率获得持续稳定的银行贷款,这种融资惯性使企业可以通过高额负债实现资产的迅速扩张.同时,由于民营化并没有改变控股股东的控制权收益,接手国有企业的大股东有强烈的动机通过关联方交易来掏空其利用融资惯性而加速积累的资产,并可以进一步利用破产重组和股权分置改革中的漏洞,逃脱大额银行贷款的约束而金蝉脱壳,从而导致国有资产加倍流失.可见,民营化的真实动机是影响民营化效率的根本因素,控制权与剩余所有权的分离是大股东掏空上市公司的直接原因,而国有资本管理、金融企业贷款管理、上市公司交易监管等方面的缺陷则为民营化后国有资产的加倍流失提供了机会.文章开拓性地研究了控制权收益的具体来源,融资惯性增加了民营化后控股股东的控制权收益,是导致国有资产被加倍掏空的隐蔽渠道.因此,完善金融机构的贷款制度并加强对上市公司掏空行为的监管和惩戒,是避免“国退民进”中利用融资惯性掏空国有资产的基础.     

CEO hometown ties and tax avoidance‐evidence from China's listed firms

This study investigates the effects of CEO hometown ties on corporate tax avoidance. The results show that CEO hometown ties to local government officials have a significantly positive impact on tax avoidance for private firms in China. We also find that the hometown ties effect is more pronounced in cities with weak public governance and in cities whose municipal Party committee secretaries are promoted from the same city, whereas the effect is weak in cities whose municipal Party committee secretaries are transferred from other places. In summary, our results suggest that hometown ties as an important political resource can facilitate connected private firms to obtain more economic resources from government.     

启发式方法确定最短配送路径

描述配送中心最短配送路径的数学模型并提出应用基于模拟退火的启发式方法求解，同时详细说明了该方法中问题解的表示方法、产生新解的方法以及优化方法流程，并对该方法的可行性和有效性进行验证。     

全球股票市场系统性风险传递网络研究

本文采用系统性风险度量新指标LASSO-ΔCoVaR,构建全样本时期及各极端时期全球股票市场系统性风险传递网络,考察全球股票市场系统性风险传递水平及结构特征,并着重对极端状态下的风险传递进行分析。研究发现:第一,无论风险输入水平还是风险输出水平,不同股市的动态变化趋势大体一致,但波动幅度迥然不同,且单个股市风险输出水平的波动幅度远大于风险输入水平;第二,成熟经济体经济基本面恶化往往会增强其股市的系统性风险贡献,而新兴经济体则不同;第三,法国、荷兰、中国香港、德国和英国股市的风险溢出水平较高,同其他股市间的风险传递途径较多,是系统性风险传递网络中的核心节点;第四,我国股市与全球股市间的风险关联较弱,但我国股市潜在风险来源面广,同区域股市及金砖国家股市在我国股市与全球股市间的风险传递发挥重要作用。     

TESTING FOR STATIONARITY IN HETEROGENEOUS PANEL DATA IN THE CASE OF MODEL MISSPECIFICATION

This paper investigates the performance of the tests proposed by Hadri and by Hadri and Larsson for testing for stationarity in heterogeneous panel data under model misspecification. The panel tests are based on the well known KPSS test (cf. Kwiatkowski et al.) which considers two models: stationarity around a deterministic level and stationarity around a deterministic trend. There is no study, as far as we know, on the statistical properties of the test when the wrong model is used. We also consider the case of the simultaneous presence of the two types of models in a panel. We employ two asymptotics: joint asymptotic, T, N →∞ simultaneously, and T fixed and N allowed to grow indefinitely. We use Monte Carlo experiments to investigate the effects of misspecification in sample sizes usually used in practice. The results indicate that the assumption that T is fixed rather than asymptotic leads to tests that have less size distortions, particularly for relatively small T with large N panels (micro‐panels) than the tests derived under the joint asymptotics. We also find that choosing a deterministic trend when a deterministic level is true does not significantly affect the properties of the test. But, choosing a deterministic level when a deterministic trend is true leads to extreme over‐rejections. Therefore, when unsure about which model has generated the data, it is suggested to use the model with a trend. We also propose a new statistic for testing for stationarity in mixed panel data where the mixture is known. The performance of this new test is very good for both cases of T asymptotic and T fixed. The statistic for T asymptotic is slightly undersized when T is very small (≤10).     

电喷雾解吸质谱及其应用

电喷雾解吸离子化是近年来发展起来的一种质谱离子化方式,它是电喷雾离子化和解吸离子化两大离子化技术的结合,在大气压条件下,样品不必经过预处理可以直接检测。因此,电喷雾解吸电离是具有分析速度快、特异性高、灵敏度高等特点,并且可进行原位分析。本文对电喷雾解吸电离的离子化机制及电喷雾解吸离子化仪器的最新进展进行了阐述,并对其分析特点以及DESI在各个领域的应用进行综述。     

艺术类工业设计专业工程类课程教学探讨

目前我国的工业设计教育的招生范围比较宽,学生很大一部分是从艺术类考生中招生的,文化课较为薄弱和工程类知识比较缺乏,很多高校都开设了相应的工程类课程。本文根据自己在教学过程中发现的问题,针对艺术类学生工程基础的教学内容、知识深度、实践内容以及训练方式等进行了探讨。     

资管新规延期的原因及对策研究

资管新规的延期有利于处置存量资产,有助于减轻银行表内压力,有利于降低信用风险爆发概率,有利于平滑理财产品收益,也有助于实体经济应对疫情冲击。但是资管新规延期后,仍然面临着存量资产处置难、新产品发行接受度不高、机构转型动力不足等问题。为了避免资管新规一延再延,维护政策的严肃性、权威性,监管部门应提出退出路径、加强预期管理、明确奖惩措施、统一监管规则,并实行宽严相济、灵活有度的政策,保证资产管理行业转型真正落地生效。     

外资持股与企业社会责任表现

外资股东是我国资本市场的重要参与者,本文从外资股东对企业社会责任的双向影响机制出发,研究外资股东基本特征与企业社会责任之间的关系,旨在探索如何引导外资股东对我国上市公司发挥积极作用.本文研究发现:(1)外资持股比例与企业社会责任之间存在正U型关系,说明较高的持股比例是外资股东对企业社会责任发挥积极作用的前提条件;(2)持股时长对持股比例较低的外资股东有正向的社会责任调节作用,说明持股时长能够缓解外资低持股水平对企业社会责任所产生的负面影响;(3)发放现金股利或引入国有性质股东能够增加外资持股企业的社会责任表现,说明股利补偿与股权制衡是外资持股企业提升社会责任表现的有效手段.通过进一步研究我们还发现,外资的入股方式、投资动机与股东类型对外资持股企业的社会责任表现也存在显著影响.本文的研究为政府逐步放开外资持股比例、鼓励外资股东"多投长投"提供了经验证据;同时,还有助于上市公司合理制定相应政策,以便能够更加有效地利用外商资源.