On discrimination in the optimal management of teams

We study the optimal management of teams in which agents’ effort decisions are mapped (via a production technology) into the probability of the team’s success. Optimal wage schemes in such context are largely discriminatory, but we show that the extent of the discrimination crucially depends on the existence of moral hazard. More precisely, for teams with a flat structure, the domain of production technologies giving rise to discrimination is broader when agents’ actions are observable and contractible. For teams with a sequential structure, the result reverses and the domain of production technologies giving rise to discrimination is broader when there exists moral hazard. Finally, in more cooperative environments in which agents are allowed to collude, optimality does not entail discrimination, with or without moral hazard.     

Evaluating the multi-period efficiency of East Asia airport companies

The aim of this study is to analyze how internal operating sub-processes and annual operations of airport companies influence the overall efficiency. The multi-period Network Data Envelopment Analysis is used to evaluate the efficiencies and the efficiency changes for East Asia airport companies. The results indicate that the overall efficiencies of airport companies during a specified period of time are affected by the system efficiency and the sub-processes’ efficiencies in individual periods. Furthermore, the overall efficiency change is determined by the sub-processes’ efficiency changes. According to the operating decision analysis matrix, managers can discover the inefficient sub-processes and formulate the improvement countermeasures.     

Efficient resource allocation under multi-unit demand

We study resource allocation with multi-unit demand, such as the allocation of courses to students. In contrast to the case of single-unit demand, no stable mechanism, not even the (student-proposing) deferred acceptance algorithm, achieves desirable properties: it is not strategy-proof and the resulting allocation is not even weakly efficient under submitted preferences. We characterize the priority structure of courses over students under which stability is consistent with strategy-proofness or efficiency. We show that stability is compatible with strategy-proofness or efficiency if and only if the priority structure is essentially homogeneous. This result suggests that efficient allocation under multi-unit demand is difficult and that the use of stable mechanisms may not deliver desirable outcomes.     

对我国水果进出口贸易的思考

近20年来,我国水果总产量增长迅速,水果进出口贸易增长的幅度也很快,但是水果进口额增长速度远远高于出口额增长速度。目前我国水果出口存在很多问题,如没有自己的品牌,经营观念落后等。这造成了我国虽然是水果的生产大国,却是出口小国。本文对我国水果出口存在的问题,提出了一些解决方法。     

Information in generalized method of moments estimation and entropy-based moment selection

In this paper, we make five contributions to the literature on information and entropy in generalized method of moments (GMM) estimation. First, we introduce the concept of the long run canonical correlations (LRCCs) between the true score vector and the moment function f(_vt,_θ0)$f(v_t,{\theta }_0)$ and show that they provide a metric for the information contained in the population moment condition E[f(_vt,_θ0)]=0$\mathrm{E}[f(v_t,{\theta }_0)]=0$. Second, we show that the entropy of the limiting distribution of the GMM estimator can be written in terms of these LRCCs. Third, motivated by the above results, we introduce an information criterion based on this entropy that can be used as a basis for moment selection. Fourth, we introduce the concept of nearly redundant moment conditions and use it to explore the connection between redundancy and weak identification. Fifth, we analyse the behaviour of the aforementioned entropy-based moment selection method in two scenarios of interest; these scenarios are: (i) nonlinear dynamic models where the parameter vector is identified by all the combinations of moment conditions considered; (ii) linear static models where the parameter vector may be weakly identified for some of the combinations considered. The first of these contributions rests on a generalized information equality that is proved in the paper, and may be of interest in its own right.     

对于我国公平与效率关系的经济学思考

本文主要通过对我国公平与效率关系的描述及当前面临的现状的分析,运用帕累托效率的分析方法,得出公平与效率本质上具有一致性的结论,在此基础上提出公平与效率可以实现最优结合。我国目前正值“十一五”规划纲要的实施初期,大力发展和谐社会,应该在微观领域体现效率优先的原则,宏观领域公平优先的原则,来实现二者的最优结合。     

省联社管理及其对农信社效率提升的影响:理论与实证研究

合理地衡量和评价省联社对农信社效率的影响,是推动省联社改革的基础,也是当前理论和实践中面临的难题。本文在对省联社的管理服务职能详细调查的基础上,提出了通过比对省联社管理导向和农信社效率提升方向之间的差异,间接分析省联社管理对农信社效率的影响,并以2010-2017年A省75家农信社为研究对象进行了实证分析。研究结果表明,当前省联社管理的总体导向是:有效引导农信社在扩大业务规模的同时,控制总成本收入比和降低不良贷款水平,但对农信社的利润水平、风险覆盖水平、支农支小情况缺乏实质性约束;在推动农信社改制为农商行的过程中缺乏对其提高经营效率的帮助,在管理中未充分考虑各家农信社及其所处市场环境的差异等。文章建议,当前省联社改革的路径是“减少管理+增强服务”,其中减少管理的关键是解决退出职责谁接管的问题,而增强服务的关键是对省联社进行更有效的激励约束。     

房地产投资和金融支持实体经济的交互影响研究--基于环沪都市圈的分析

基于房地产市场与金融发展的紧密关系,本文将房地产投资、金融发展与实体经济发展纳入同一框架进行综合研究。首先梳理房地产、金融效率的环沪都市圈1发展现状,深入探讨房地产、金融与宏观经济增长的作用机制。然后以2003~2016年环沪都市圈为样本,采用交互效应模型分析房地产投资通过金融体系间接影响经济发展的综合效应。分析得到的主要结论包括:环沪都市圈房地产投资对实体经济发展整体呈现一定的负向作用,主要是抑制了金融支持实体经济的效率,两者负相关系数为0.75;经实证研究进一步发现,在经济发展水平较弱、金融化程度越高的城市群,房地产投资对金融支持实体经济效率的抑制作用更加显著,是全部样本的2.4倍,这也恰好解释了浙北经济长期落后于苏南的原因。     

农村金融机构经营效率测算及影响因素的空间计量分析——兼论农村金融机构改革

农村金融改革的目标之一在于提升农村金融机构的经营效率,但相关研究较少考虑不良贷款约束,对农村金融机构经营效率及其影响因素的空间计量也很少涉及。基于此,本文以较具代表性的沿海地区G省为例,运用非径向EBM-Undesirable模型从多个视角测算分析了农村金融机构的经营效率,并基于空间相关性检验和空间计量模型,对经营效率进行了空间效应分析与影响因素估计。结果显示:农村金融机构经营效率总体水平较高,但起伏较大;农商行效率高于农信社,但2015年后差距有所缩小;经营效率具有空间相关性,经济水平、产业结构、行业竞争、资产规模和盈利能力是驱动因素,隐形风险是阻碍因素。鉴此,本文提出了加快推进农商行治理能力建设和产品服务创新、将经营效率作为农信社改制的重要参考指标、监管部门和省联社给予针对性经营指导、深化邻近协同经营等政策建议。