GMADM-based attributes selection method in developing prediction model

Attribute Selection is an important issue for developing a prediction model, however, how to determine an effective attribute selection algorithm is an important but difficult issue. Attribute selection can effectively delete the irrelevant and redundant attributes to increase the prediction accuracy, and evaluating attribute selection methods usually need to consider several criteria such as accuracy, type I error, and type II error. In this paper, the selected attribute process is modeled as a group multiple attributes decision making (GMADM) problem. In evaluating different GMACD methods, the most results usually are consistently, But there are some situations where the evaluated outcomes have different results. The GMADM method is useful tool for evaluating attribute selection algorithms, and the TOPSIS is capable of identifying a compromised solution when different GMADM method result in conflicting rankings. Therefore, this paper proposes an objective (persuasive) GMADM-based attributes selection method to solve this disagreement and help decision makers pick the most suitable method. After verification, the proposed model is more persuasive to evaluate the attributes selection methods for developing prediction model.     

人口结构对住宅价格的影响——基于北京地区的实证研究

文章以北京市为例,使用1990—2011年北京地区人口结构和商品住宅价格数据,分析该地区人口结构变量对于房价的动态影响。文章发现,北京地区房价受到劳动人口比重、人口城镇化率、第三产业从业人口比重等三个人口结构变量的显著影响。其中,劳动人口比重对于房价的正向影响持续最短;第三产业从业人口比重对于房价的正向影响持续最长,影响力度也是最大;同时,人口结构变量整体对于房价的影响具有长期性。     

浙江省区域旅游资源的空间结构分析

文章通过最近邻比指标、旅游资源丰度指标来衡量浙江省旅游资源空间集聚程度和分布情况。研究发现:浙江省旅游资源属于集中型分布;绍兴市旅游资源的丰度最高,其次是金华市和杭州市,而衢州市旅游资源的丰度最低。     

完善我国绿色信贷主体权利义务关系的若干思考

本文从绿色信贷的基本概念入手,分析了现阶段我国绿色信贷主体权利义务间的问题,即环保部门、银行权利过大,企业承担义务过多,导致绿色信贷政策运行效果不佳,而通过重新界定主体间的权利义务关系,使绿色信贷主体之间权利义务相对平衡,以达到完善我国绿色信贷政策的目的。     

个税专项附加扣除政策的赡养激励效应研究——基于城镇家庭的模糊断点回归设计

2018年个人所得税改革新增赡养老人专项附加扣除,为探索家庭赡养行为的税收经济调节机制,本文以江苏11535户城镇家庭受赡关系为样本,采用基于被赡养人年龄闽值的模糊断点回归设计,考察赡养老人专项附加扣除对医疗、非医疗和总赡养支出的处理效应,并针对主赡养人身份、赡养人性别和被赡养人性别进行异质性分析.实证结果表明:赡养老人专项附加扣除具有税收激励和孝亲示范效应,对非医疗赡养支出的处理效应明显高于医疗赡养支出且存在过度反应,改变核函数和带宽计算函数的结论仍稳健.主赡养人身份和赡养人性别对赡养行为结构存在差异化影响;填报扣除提前兑付女性被赡养人的赡养支持预期.当前赡养扣除标准可从被赡养人数量和年龄阈值、赡养行为细分、扣除分摊限额等方面进行优化.     

营商环境对企业税收不确定性的影响研究——基于企业生命周期的视角

企业税收不确定性是通过测度企业税收负担的波动,从微观视角考察企业税收风险的度量指标,反映了微观主体在现行税收政策和制度下的纳税遵从成本.本文结合我国营商环境改革的背景,重点研究营商环境优化是否有效降低了企业的税收不确定性.以2009-2019年我国沪深A股上市公司为样本,实证研究发现营商环境优化能够降低企业税收不确定性.此外,本文还重点考察了企业处于不同生命周期时,营商环境对企业税收不确定性的影响效应差异.本研究有助于企业管理层制定差异化的税收战略,降低企业税 收不确定性、缓解企业税收风险,同时也为政府相关部门评价优化营商环境政策的实施效果提供参考依据.     

R&D investment intensity and jump volatility of stock price

Review of Quantitative Finance and Accounting - This paper studies the important but unexplored relationship between R&D investment intensity and different components of stock price...     

Tourism demand in Hong Kong: income,prices, and visa restrictions

This paper examines the determinants of Hong Kong tourism demand for the top-three major tourist arrival countries, namely Mainland China, Taiwan, and Japan, with an error correction model. Specifically, this paper will examine the effects of relaxing the visa requirement, the launch of the Individual Visit Scheme (IVS), for Mainland Chinese tourists in 2003. Empirical results show that tourists are income-elastic and consider international tourism to be a luxury good. Tourists are more sensitive to changes in the nominal exchange rate than to changes in the foreign pricing level. The positive effect of the launch of the IVS for Mainland Chinese tourists outweighs the adverse impact of the severe acute respiratory syndrome (SARS) on tourism demand for Hong Kong.     

资源产业链演化机制研究——以西部地区为例

资源产业链是以资源为核心的要素整合机制。资源是资源产业链的基础要素,知识、资本是驱动要素,生态是制约要素。通过对实体的抽象,可建立以知识、资本、资源、生态共生关系为基础的资源产业链动态演化模型,并以此构建资源产业链“四要素整合”机制。基于这个模型和机制来分析,目前西部地区的资源产业链仍处于由初级向中级迈进的转折阶段,因此应进一步发挥知识要素驱动优势,减少对资源的依赖,实施三要素共同提升,以实现产业链的深度、有序和完整性演化。     

外资银行,离中国百姓有多远

<正>2001年12月11日,中国正式加入WTO,金融业的大门开始向外资银行敞开。此后5年,中国逐步取消了外资银行在内地开展业务的地域限制及其他非审慎性限制,至2006年12月,银监会颁布的《外资银行管理条例》