基于碳排放视角的区域效率及其影响因素分析——低碳城市的一个测度

低碳城市建设是当前中国城市发展的重要课题,而城市低碳经济发展水平的测度则是其中的一个重要环节。本文基于碳排放视角,选择代表性国家(地区)和城市样本进行比较研究,将碳排放数量这一非期望产出变量作为投入进行处理,在科学设计DEA计量模型基础上,通过对区域整体效率及其影响因素进行实证分析,实现对低碳城市建设水平的测度,并据此进行结论分析,研究提出若干启示性建议。     

后金融危机时代公允价值计量在我国的应用

在后金融危机时代,公允价值的计量问题给我们留下了广泛的思考空间。从金融危机中各方对公允价值的争议出发,通过对公允价值的背景、定义、计量方法的回顾及其优劣势的分析,在肯定公允价值计量的基础上,提出了相应的改进意见。     

论毒品纯度与涉毒行为之定罪量刑关系

现行刑法第357条第2款之规定使得我国刑法理论界及司法实务界对于涉毒行为中的毒品纯度问题极为轻忽,体现出较为明显的＂惟数额论＂,因之导致的结果必然是定罪与量刑上的显失公正。毒品纯度不容置辩地与涉毒行为的社会危害性密接相关,其不仅影响罪犯处刑的轻重,而且关涉行为的定性,即牵及行为的罪与非罪、此罪与彼罪的问题。对涉毒行为欲实现定罪与量刑上的公允,就必须彻底摒弃＂惟数额论＂,对毒品纯度进行充分考量。     

预防与惩治学术不端行为之我见

学术不端事件是在特定的环境中产生的,其表现形式形形色色、多种多样,产生了非常恶劣的社会影响,必须采取一些切实可行的措施予以惩治与预防,如弘扬科学道德,改革评价体系,制定严厉的惩处制度,通过反剽窃软件予以验证等,以净化学术空气,还学术界一片纯净的蓝天。     

Dimensions of Identity Development Scale: Confirmatory factor analysis,gender invariance,and external validity of the Persian version

The present study was conducted to examine the psychometric properties and gender invariance of the Iranian version of the Dimensions of Identity Development Scale (DIDS). A total of 1453 adolescents (50.8% female; 14–18 years old, mean = 15.48) participated in a cross-sectional study and completed the DIDS and the Youth Self-Report of behavior problems. The Confirmatory Factor Analysis supported the six-factor model of the DIDS, echoing past studies showing the original 5th factor (Exploration in Depth) being divided into Exploration in Depth and Reconsidering the Commitment. The invariance testing showed comparable measurement properties of the DIDS across males and females (strict measurement invariance). Further, behavior problems were associated positively with Ruminative Exploration and negatively with Commitment Making, Identification with Commitments, Exploration in Depth, and Reconsideration of Commitments, whereas the opposite was true for academic performance. A six-factor DIDS was shown to be a valid and reliable measure for the assessment of identity development dimensions among Iranian adolescents. Future studies in the Iranian context evaluating the identity clusters derived from identity dimensions and their gender differences are warranted.     

股市有效性综合指数及其应用

EugeneFama所确认的“弱一半强一强”三个层次一直被用以度量股市的有效性程度,但因该理论存在很多缺陷,故采用统计指数对股市有效性进行综合评价,将股市有效性以指数的形式量化表示,该指数可被视为股市在有效性上的“得分”。将股市有效性以统计指数的形式加以测度,可以很好地克服Fama理论中的种种弊端。     

金融资产收益非对称性的多标度分形测度及其在VaR计算中的应用

通过提炼多标度分形分析过程中所产生的对描述金融资产收益非对称特征有益的统计信息,提出了一种新的资产收益非对称测度--多标度分形非对称测度(Multifractal asymmetry measurement)Δf,并以沪深300指数长达7年左右的5分钟高频数据为实证样本,通过两种不同的VaR后验分析(Backtesting analysis)方法,实证对比了Δf测度和传统的偏度系数(Coefficient of skewness)测度在市场风险计算准确性方面的差异。实证结果表明:基于Δf测度的市场风险计算模型的VaR计算精度优于基于偏度系数测度的对应模型,Δf测度具有较偏度系数测度更为优异的对金融资产收益非对称特征的刻画能力。     

基于购买行为RFM及评论行为RFMP模型的客户终身价值研究

在Web2.0时代,越来越多的消费者在购物网站、点评类网站以及社交类网站上发表自己对产品或服务的相关看法,由此对企业产生了巨大的影响。针对用户在线评论行为所产生的价值,以传统的RFM模型为基础构建了基于评论行为的RFMP模型。同时将购买RFM和评论RFMP模型进行结合,提出了适用于线上企业的客户终身价值评价方法,采用熵值法进行了指标权重的确定,并最终选取大众点评网的实际用户数据进行了传统客户终身价值与改进客户终身价值的对比。通过对用户群进行细分,为企业提供了更加精准的营销决策及管理建议。     

Nonparametric Kernel Methods with Errors‐in‐Variables: Constructing Estimators,Computing them,and Avoiding Common Mistakes

Estimating a curve nonparametrically from data measured with error is a difficult problem that has been studied by many authors. Constructing a consistent estimator in this context can sometimes be quite challenging, and in this paper we review some of the tools that have been developed in the literature for kernel‐based approaches, founded on the Fourier transform and a more general unbiased score technique. We use those tools to rederive some of the existing nonparametric density and regression estimators for data contaminated by classical or Berkson errors, and discuss how to compute these estimators in practice. We also review some mistakes made by those working in the area, and highlight a number of problems with an existing R package decon .     

Gendered Sexuality: A New Model and Measure of Attraction and Intimacy

Currently, the literature related to sexual orientation is ambiguous with regard to the relationship of sexual orientation, sexual identity, attraction, and intimacy. In order to explore the relationships of self-identified categorical sexual identity (which is the most popular method of sexual orientation assessment) with attraction and intimacy, it is imperative that researchers have access to a reliable and valid measure of the latter. The present study proposes a model for conceptualizing attraction and intimacy, termed gendered sexuality, and examines the factor structure of a measure designed to assess the construct. Results suggest that four factors adequately accounted for the variance in gendered sexuality in a large sample of young adults. These factors assess attraction to females, attraction to males, intimacy with females, and intimacy with males. Exploratory analyses provided preliminary evidence of potential construct validity and suggested that discrepancies between desired and available behavior predict dissatisfaction in interpersonal role as measured by the Outcome Questionnaire 45.2.