涂附磨具单位面积CaCO3含量分析方法的改进

以铜试剂代替氰化物作掩蔽剂 ,用EDTA容量法测定涂附磨具单位面积CaCO3 含量 ,获得了满意的效果。     

金融期权定价模型与金融风险管理

金融期货是一种具有独特功能的非常重要的衍生金融工具 ,对规避金融风险有重要意义 ,其作为一种金融资产表现为一种特定的权利。B -S期权模型开创性地表达了这种期权定价理论 ,二项式模型则将各种金融期权定价模型推向简化和实用化。     

论提高理性思维

随着知识经济时代的到来,知识、信息、科技在生产和社会发展中的地位和作用越来越突出。新世纪需要开发人的智力资源,发展思维科学,用理性思维工具认识自然、制御环境、改造社会。现代的思维方式、方法作为人类的重要“资源”,对它的开发,即对人的智力的开发,已被提到极重要的地位。     

“国培计划”培训团队建设政策的反思与改进--基于政策工具与政策要素的二维分析

培训团队建设是实施“国培计划”的基础工程,是保证“国培计划”实施质量的关键所在。“国培计划”培训团队建设政策是引领“国培计划”培训团队建设实践的重要依据。以2010-2019年“国培计划”培训团队建设政策文本为研究对象,基于政策工具与政策要素的二维分析框架展开研究。研究发现,“国培计划”培训团队建设政策经历了“建章立制”(2010-2012年)、“稳步发展”(2013-2014年)、“精准推进”(2015-2019年)三个阶段,呈现出政策工具差异化、团队成员多元化、运行机制精准化等特征,同时也暴露出政策工具运用失衡、团队建设目标不清晰、相关政策难以有效落地等问题。因此,“国培计划”培训团队建设要注重优化政策工具结构、明确团队建设目标、坚持因地因时制宜,进一步提升政策的长效性、持续性和精准性。     

Performance measurement with classification information: an enhanced additive DEA model

This paper presents an improved measurement tool for evaluating performance of branches within a major Canadian bank. While there have been numerous previous studies of performance in the banking industry, particularly at the branch level, this study is different in a very significant way: specifically two kinds of data are used to develop the model. The first type of data is that related to standard transactions, available from any bank; such have formed the basis of numerous previous studies. The second type of data, obtained from the site studied, is classification information, based on branch consultant/expert judgment as to good and poor performance of branches. The purpose herein is to present a modified version of an existing benchmarking model, data envelopment analysis (DEA), and to show how this tool is applied in the banking industry. The mechanism used herein to incorporate expert knowledge within the DEA framework is to first apply a discriminant or classification tool, to quantify the functional relation that best captures the expert's mental model for performance. The outcome of this first phase is an orientation of variables to aid in the definition of inputs and outputs. The resulting orientation then defines the DEA model that makes up the second phase of the model.     

政策工具视角的中国装配式建筑政策文本量化研究

为了更科学地进行政策分析和研究,评测已有装配式建筑政策体系完善与否,从政策工具的视角,将基本政策工具、装配式建筑驱动主体和产业价值链组合成一个三维研究框架.利用该框架,运用内容分析法对中国现有13份中央政府级装配式建筑政策文本中采用的政策工具进行计量和分析.得出环境型和供给型政策工具过溢,针对企业和科研机构的政策工具缺失,装配式建筑产业价值链维度的政策工具滞后于其价值实现环节等结论,并为完善装配式建筑政策体系提出建议.     

Are VAT reforms an effective tool for promoting culture? A quasi-experiment in Spain

Sponsoring culture is a long-term profit-generating investment that public policy makers can achieve by means of Pigouvian subsidy or tax schemes. This paper evaluates the effectiveness of the three VAT reforms implemented between 2012 and 2018 (one tax raise reform and two tax cut reforms) in the cultural sector in Spain. We first provide visual evidence and empirical estimates of the tax shifting and the distribution of the VAT burden between consumers and producers. We then use a regression discontinuity design to assess the causal effects of these VAT reforms on performing acts and cinema consumption (both in the extensive and the intensive margin). Several interesting findings arise from our results. First, we find that producers only passed through 45% of the VAT cut to consumer prices. Second, the effect of the 2017 VAT reduction on performing arts slightly increased the number of households consuming these cultural services, whereas the 2018 tax cut on cinema had no significant effect in the number of moviegoers (extensive margin). Third, the cultural spending per household conditional on participation (intensive margin) increased after the two VAT rate reductions. Finally, we test for asymmetries in pass-through with respect to the 2012 tax raise and we find (i) no evidence of prices responding more strongly to increases than to decreases in VAT, (ii) a symmetric response of the number of households consuming these cultural services, and (iii) an asymmetric response of the average cultural spending conditional on participation.     

Assumption-aware tools and agency; an interrogation of the primary artifacts of the program evaluation and design profession in working with complex evaluands and complex contexts

Like artisans in a professional guild, we evaluators create tools to suit our ever evolving practice. The tools we use as evaluators are the primary artifacts of our profession, reflect our practice and embody an amalgamation of paradigms and assumptions. With the increasing shifts in evaluation purposes from judging program worth to understanding how programs work, the evaluator’s role is changing to that of facilitating stakeholders in a learning process. This involves clarifying purposes and choices, as well as unearthing critical assumptions. In such a role, evaluators become major tool-users and begin to innovate with small refinements or produce completely new tools to fit a specific challenge or context.We interrogate the form and function of 12 tools used by evaluators when working with complex evaluands and complex contexts. The form is described in terms of traditional qualitative techniques and particular characteristics of the elements, use and presentation of each tool. Then the function of each tool is analyzed with respect to articulating assumptions and affecting the agency of evaluators and stakeholders in complex contexts.     

基于灰色系统的小型精密机床热误差模型

为减少热误差对数控机床加工精度的影响,文章利用灰色系统研究热误差建模。初步分析机床热源后,应用灰 色关联度分析结合模糊分类方法优化得到13组关键温度测点,结合小型精密五轴机床处于实际加工状态时的实验数 据,应用GM(I,N)灰色结构进行建模。将实际数据与拟合数据进行对比分析,结果表明此灰色系统模型具有计算方法 成熟、鲁棒性强的特点,适用于机床热误差研究。     

结构性货币政策工具对农商银行风险承担的影响

基于2014—2018年21家农商银行的微观数据构建动态面板模型,采用系统广义矩估计方法分析结构性货币政策工具对农商银行风险承担的影响。研究发现:结构性货币政策工具对农商银行风险承担的影响差异显著,银行层面变量对农商银行风险承担的影响差异显著,宏观经济层面变量对农商银行风险承担的影响差异显著。据此,提出优化货币政策工具、健全宏观监管体系、提升风险监管能力等对策,以有效控制结构性货币政策工具对农村商业银行风险承担的影响,维护宏观金融市场的稳定。