Influence analysis for Poisson inverse Gaussian regression models based on the EM algorithm

For Poisson inverse Gaussian regression models, it is very complicated to obtain the influence measures based on the traditional method, because the associated likelihood function involves intractable expressions, such as the modified Bessel function. In this paper, the EM algorithm is employed as a basis to derive diagnostic measures for the models by treating them as a mixed Poisson regression with the weights from the inverse Gaussian distributions. Several diagnostic measures are obtained in both case-deletion model and local influence analysis, based on the conditional expectation of the complete-data log-likelihood function in the EM algorithm. Two numerical examples are given to illustrate the results.     

区域经济、社会发展的重要途径—府际关系视域下地方政府合作

随着区域经济一体化的发展和中央向地方的逐步放权,地方政府作为一个相对独立的地区利益主体的角色日益凸显。当今区域经济、社会发展过程中遇到的资源、环保、就业等诸多问题,需要通过地方政府的分析来解决。因此有必要强调要树立合作共赢的行政理念、完善地方政府合作的法律制度、建立地方政府合作协调机构等,以高效实现各级地方政府的行政目标,达到合作共赢的目的。     

工作要求与创新工作行为关系的研究

员工创新工作行为是员工有效完成工作任务和目标,达到组织既定工作标准的有效途径,对组织的生存与发展具有重要作用。本文基于工作要求一工作控制模型与社会交换理论,探讨在中国情号下,工作要求、员工感知的组织支持与创新工作行为的关系。通过296个有效样本,研究结果表明：工作要求与创新工作行为显著正相关;员工感知的组织支持对工作要求与创新工作行为具有正向调节作用,在工作要求压力下,相对于感知到较低组织支持的员工,感知到较高组织支持的员工更容易产生创新工作行为,并基于中国本土文化的角度分析其内在原因。研究告诉企业领导者,提高工作要求可以提高员工创新工作行为,同时要提高员工对组织支持的感知,这样才可能使员工在面临高强度的工作要求时,更积极主动地开展创新工作行为,提高工作效率和工作绩效。     

劳动力自由迁移为何如此重要?——基于代际收入流动的视角

未考虑人口迁移影响的代际收入弹性估计存在偏误。本文将人口迁移与区域特性纳入代际收入弹性估计方程,并运用迁移概率作为局部工具变量进行估计,发现迁移者的代际收入弹性不到未迁移者的一半。而当前我国代际收入流动的主要问题在于部分人群面临"代际低收入传承陷阱",他们可以通过迁移从而增加就业机会等方式摆脱这一陷阱,这至少可以使一代人免受代际低收入传承的困扰。进一步分析迁移对代际收入传递路径的影响,结果表明教育在可识别的代际收入传递路径中贡献最大,而迁移强化了这一影响。鉴于人口迁移对代际收入流动的重要影响,政府部门有必要进一步采取措施降低劳动力自由迁移的障碍,并合理分配教育资源,以增进社会公平程度。     

Political budget cycles revisited: Testing the signalling process

A widespread view in the ‘political budget cycles’ literature is that incumbent politicians seek to influence voters’ perceptions of their competence and/or preferences by using the composition of the fiscal budget as a signalling tool. However, little is known about whether voters actually receive and perceive the signal in that way. To empirically assess the relevance of the signalling channel at the municipal level, we conducted a survey among 2000 representative German citizens in 2018. Only a small fraction of voters feel well-informed about the fiscal budget signal and use the information it contains to decide whether to vote for the incumbent politician. Persons paying more attention to the signal sent by local politicians live in smaller municipalities, are more satisfied with their economic situation, are more educated, and do not feel that they are being electorally manipulated. Our analysis raises doubt about the relevance of budget composition as a signalling mechanism for voters at the local level.     

外出务工对流出地家庭生计策略的影响——来自西部山区的证据

本文首先基于可持续生计框架,引入劳动力迁移的视角,之后改进农户模型以分析劳动力外出务工对流出地家庭生计策略的影响机理,并利用陕西秦岭北麓地区1074户的调查数据进行验证。结果发现:外地打工虽然有利于家庭的资本积累,但会阻碍流出地非农生计活动的参与和劳动力供给;本地打工在促进资本积累的同时,对参与林(经济)作物种植、养殖和自营等生计活动有显著的促进作用,但过多的劳动力外出务工仍然会减少本地其它活动的收入水平。     

Efficient local IV estimation of an empirical auction model

In this paper we examine semiparametric efficiency bounds and efficient estimators for the case of a linear local instrument variable (LIV) model under the assumptions studied in Abadie et al. (2002). We apply the semiparametrically efficient estimation method to analyze the relation between bid dispersion and early bidding in an online auction dataset, which is collected from a natural experiment conducted in Nekipelov (2007). The results confirm the theoretical findings developed in Nekipelov (2007). The semiparametric efficient estimation procedure substantially improves the statistical significance of the effect of jump bidding on bid dispersion.     

地方利益对政策执行的影响及对策

地方政府是地方公共利益的代表，同时，作为中央政策执行者，它在一定程度上仍然具有独立于中央政府公共利益的自身利益，并表现为多种利益形式。地方政府利益的存在无疑会给中央政策的执行带来较大的影响，政策“擦边球”就是地方利益影响中央政策执行的典型表现形式，为了保证政策目标的最终实现，就需要采取多种措施来消除利益主体行为给政策执行造成的消极影响。     

地方政府机构改革与职能转变刍议

地方政府机构改革涉及观念及现实利益方面的阻力 ,起点高 ,难度大。要达到预期目标 ,必须彻底变革观念 ,以政府职能转变为核心 ,进行一系列配套的内涵式改革 ,变“全能政府”为有限权利政府 ,使政府行使职权与经济利益彻底脱钩 ,与责任挂钩 ,建立责任政府