应用罚函数方法构建广义指数因子预报模型——黄金价格预测的实证分析

采用不同的损失函数和罚函数构建了广义指数预报因子模型,用该模型来预测国际黄金价格.构建方法包括:1)岭估计方法;2)基于L1、L2以及二者结合的损失函数LM,利用LASSO和SCAD 2种罚函数选取不同参数EWMA的线性组合作为预报因子.实证检验表明,该方法构建的模型有效改进了单参数EWMA预测模型,其预测精度优于已有方法.     

从“菜贱伤农”谈基层农业信息服务的缺失

针对近几年频频出现的“菜贱伤农”现象,选取内蒙古乌兰察布市、山东省济南市历城区、新疆伊犁、浙江杭州萧山区四个典型案例,对基层农业信息服务的环节进行深入研究,总结出信息采集环节和信息传播环节基层农业信息服务存在的主要问题.并且在实践社区的基础上,提出几点改进的建议,希望能对中国的基层农业信息服务发展有所帮助.     

Research subsidies,industry–university cooperation and innovation

We evaluate the impact of the EC's Seventh Framework Programme, a large-scale research subsidy programme, on the innovation activities of subsidized firms, with a particular regard to industry–university partnerships. Using matching and difference-in-difference estimation, we find a positive effect on a range of innovation indicators. The number of project participants in general and university participants in particular positively affect performance, suggesting knowledge spillovers between project members. Research centres, on the other hand, do not exert positive externalities. We also find that the benefits of collaborating with universities are amplified by their academic quality.     

French Decentralisation of the Performing Arts and Regional Economic Disparities

The standard deviation, the Gini coefficient, entropy measures and Atkinson's indexes are used to study French regional inequalities for per capita subsidies to the performing arts, as compared to GDP per worker, from 1992 to 2002. The two former indexes are more sensitive to transfers around the average, while the others are more sensitive to transfers at the lower end of the distribution scale. Whereas regional disparities remained stable for GDP per worker, they decreased for per capita subsidies to institutions and companies but increased for festivals. State subsidies are less unequal than local grants, so that a balanced decentralisation seems to rely upon some state control.     

论价格歧视理论在我国职业足球联赛门票定价中的应用

门票作为俱乐部主要的收入来源,其定价方法应该以更灵活多变的形式出现,以此来吸引更多不同人群、不同消费层次的观众.二、三级价格歧视在我国职业足球联赛门票定价中分别具有不同的作用,我国的职业足球俱乐部应该借鉴国内外体育比赛的门票定价策略和销售经验,认真研究我国体育消费者的消费特征和消费市场,应该研究运用怎样的价格歧视对俱乐部和消费者最有利,从而使球队比赛门票的需求与供给达到均衡、俱乐部获得最大利润、消费者得到最大满足,从而使整个职业足球市场化达到最优状态.     

State Support and Creativity in the Arts: Some New Considerations

Neglected aspects of state support for the arts are discussed through posing two questions. First, “What kind of state is providing that support?” The extent and type of public support and its effects on the arts crucially depends on whether the state is centralised or decentralised, and on whether it is authoritarian or democratic. Second, “How is artistic creativity fostered?” ”Institutional creativity” is best supported by attributing a large role to the market and market-like institutions. “Personal creativity” hinges on intrinsic motivation, which may be crowded out by different types of public support. Important consequences for the public support of the arts follow.     

Predatory journals: Who publishes in them and why?

This sequential explanatory mixed-methods study investigated where predatory/fake journals (PFJs) are founded, which countries’ researchers publish more frequently in PFJs, the identity of the editors of PFJs, why researchers publish in PFJs, and what factors encourage such publications. A survey and semi-structured follow-up interviews were used to collect data. The results indicate that the majority of PFJs are located in developing countries; 119 journals provided incorrect postal addresses; the greatest number of researchers who published in PFJs are from India, Nigeria, and Turkey, suggesting that most of the publications in PFJs are submitted by researchers in developing countries; the interviewed Turkish researchers submitted their articles to PFJs in pursuit of rapid academic promotion; the incentive allowance system encourages researchers to publish in PFJs; and the well-known “publish-or-perish” pressure and unawareness are other potential factors that drive participants to submit their papers to PFJs.     

论“八项坏账、跌价、减值准备”与税法差异

通过具体的社会实践和分析研究，论证现行企业会计制度中，计提“八项坏账、跌价、减值准备”的会计核算与现行税法规定之间存在的差异，并对可能导致的弊端进行分析，同时提出了税收征管的一些具体对策。     

关于水价问题的最优化模型

通过对两种有关水价的定价模型的对比分析，在不同的情况下分析两种水价模型的合理性．     

试论经营者激励与约束

本文从信息不对称、国有企业股权结构的不合理性、经营者人力资本的特殊性论述了对经营者激励约束的必要性,激励约束必须通过规范的机制来实现.经营者的潜能发挥受制多方面的因素,激励约束机制是一个多元化系统,且能够相互制衡.国有企业要发挥激励约束机制的有效性,必须建立和完善人力资本市场,规范证券市场.