Twicing Kernels and a Small Bias Property of Semiparametric Estimators

The purpose of this note is to show how semiparametric estimators with a small bias property can be constructed. The small bias property (SBP) of a semiparametric estimator is that its bias converges to zero faster than the pointwise and integrated bias of the nonparametric estimator on which it is based. We show that semiparametric estimators based on twicing kernels have the SBP. We also show that semiparametric estimators where nonparametric kernel estimation does not affect the asymptotic variance have the SBP. In addition we discuss an interpretation of series and sieve estimators as idempotent transformations of the empirical distribution that helps explain the known result that they lead to the SBP. In Monte Carlo experiments we find that estimators with the SBP have mean‐square error that is smaller and less sensitive to bandwidth than those that do not have the SBP.     

Application of the Fuzzy Weighted Average in Strategic Portfolio Management*

We propose a systematic approach that incorporates fuzzy set theory in conjunction with portfolio matrices to assist managers in reaching a better understanding of the overall competitiveness of their business portfolios. Integer linear programming is also accommodated in the proposed integrated approach to help select strategic plans by using the results derived from the previous portfolio analysis and other financial data. The proposed integrated approach is designed from a strategy‐oriented perspective for portfolio management at the corporate level. It has the advantage of dealing with the uncertainty problem of decision makers in doing evaluation, providing a technique that presents the diversity of confidence and optimism levels of decision makers. Furthermore, integer linear programming is used because it offers an effective quantitative method for managers to allocate constrained resources optimally among proposed strategies. An illustration from a real‐world situation demonstrates the integrated approach. Although a particular portfolio matrix model has been adopted in our research, the procedure proposed here can be modified to incorporate other portfolio matrices.     

A nonparametric assessment of model adequacy based on Kullback-Leibler divergence

A discrepancy measure to assess model fitness against a nonparametric alternative is proposed. First, a Polya tree prior is constructed so that the centering distribution is the null. Second, the prior is updated in the light of data to obtain the posterior centering distribution as the alternative. Third, a Kullback-Leibler divergence type of test statistic is derived to assess the discrepancy between the two centering distributions. The properties of the test statistic are derived, and a power comparison with several well-known test statistics is conducted. The use of the test statistic is illustrated using network traffic data.     

Sociopolitical Development and Vocational Expectations Among Lower Socioeconomic Status Adolescents of Color

The well‐documented aspiration‐expectation gap refers to lower socioeconomic status (SES) adolescents of color expecting to attain occupations with lower pay and status than the occupations to which they aspire. Sociopolitical inequity, such as structural racism and asymmetrical access to resources, may explain this gap. This article examines the capacity to cope with sociopolitical inequity (i.e., sociopolitical development) and its relationship to vocational expectations among this population. Analyses revealed that sociopolitical development was associated with higher vocational expectations and may contribute to reducing the vocational aspiration‐expectation gap among lower SES adolescents of color. Furthermore, career counseling, guidance, and psychosocial interventions may be augmented by incorporating sociopolitical development.     

Importance Counts: The Role of Relative Importance of Service Elements in Client Satisfaction Measures

ABSTRACT

It is not uncommon for social work service providers, researchers, and evaluators to develop measures to obtain client satisfaction data relevant to their particular service settings. These measures are often constructed through a set of (usually Likert-type) satisfaction rating response items for each of the service elements relevant to their settings. Scores from these multiple items are then either summed or averaged to produce global satisfaction scores. By summing or averaging satisfaction scores across all items, one implicitly assumes that all survey items that represent various service elements carry equal weight. This assumption of equal weight is somewhat counterintuitive because individual clients may perceive certain survey items or service elements to be more important, or carry more weight, than others. Analyzing data from interviews with 112 clients of an elderly case management service agency in a large city in the Midwest region of the United States, this study examined this equal weight assumption in an elderly case management service setting. Results indicated that not all service elements were considered equally important, which called into question the common practice of summing or averaging satisfaction scores of various service elements to represent global client satisfaction.     

The role of parenting and personal characteristics on deviant peer association among European American and Latino adolescents

This study examined both mothers’ and fathers’ parenting (positive and negative) and adolescents’ personal characteristics (religiosity, social initiative, aggression, depression) in relation to perceived deviant peer association for European American and Latino adolescents. Using structural equation modeling, adolescents’ reports of positive or negative mothering and fathering were found to be related to adolescents’ personal characteristics, and these characteristics were, in turn, related to perceived deviant peer association. Ethnic differences in means were found in both parenting and outcome variables, with European American adolescents reporting higher levels of positive parenting and social initiative, and lower levels of perceived deviant peer association than Latino adolescents. Despite these mean differences, no ethnic differences were found in the overall measurement or structural model, suggesting that this process functions similarly for these two ethnic groups.     

External technology acquisition and product innovativeness: The moderating roles of R&D investment and configurational context

An increasing number of studies in technology/innovation management contribute to the understanding of the relationship between external technology acquisition and product innovation performance. On the other hand, the meta-analytic reviews of new product development literature indicate a positive impact of product innovativeness on product innovation performance. However, existing research has not examined the link between external technology acquisition and product innovativeness. This study, therefore, aims to fill this gap of knowledge by investigating the external technology acquisition—product innovativeness relationship and examining the moderating roles of R&D investment and configurational context on this link. Based on a panel sample of 105 high-technology firms over a six-year period, a least squared dummy variable s model reveals interesting results. First, external technology acquisition has a positive impact on product innovativeness. Second, R&D investment increases the effect of external technology acquisition on product innovativeness. Lastly, firm size exhibits a negative effect on the contribution of external technology acquisition to product innovativeness. However, firm age positively impacts the relationship between external technology acquisition and product innovativeness. In addition, this study reveals a positive effect of product innovativeness on firm growth.     

To Weight or not to Weight: The Role of Domain Importance in Quality of Life Measurement

Although there are problems associated with thepractice of deriving weighted satisfactionscores by multiplying importance ratings andsatisfaction ratings of life domains, theseproblems do not seem sufficient to justify theabandonment of incorporating domain importanceweighting into quality of life (QoL)instruments. This paper shows that domainimportance as a weighting mechanism in QoLinstruments can be conceptually,psychometrically and empirically reasonable. Given the lack of conceptual or theoreticaldevelopment regarding the role of domainimportance in QoL instruments, it is importantto focus our attention on how to weight.     

Optimal estimate of population age structure with varying vital rates

The author presents a method for estimating the age distribution of a population under varying vital statistics. "Some mathematical aspects of the method, as well as its applicability, will be discussed and numerical simulation will be run to illustrate the results and to compare the method with the traditional estimate of stable population theory...."     

论法律语言的意义和作用——自社会语言学跨领域的视角观察

长期以来,整个法律职业所通用的语言,无论是律师和法官在法庭上的用语,抑或是形诸于文字的法条用语,或与当事人权益有切身关系的法律文件的用语,甚至是法学院课堂上的,较之于一般日常生活中所使用的语言,无疑具有相当程度的特殊性。这点可以说是古今中外皆然。自从法律语言学的开山鼻祖DavidMellinkoff教授于上个世纪六十年代,题为TheLanguageoftheLaw(《法律的语言》)一书问世以来,无论是法学界、社会学学界、人类学抑或语言学学界莫不从法律语言学视为具有独立生命力的学科出发,开始重视法律语言的社会地位、功能以及属性。无疑地,正因为法律是一门专业性强、技术性亦高的职业,法律语言也就成了一种具有高度专业性和特殊性的语言,象征着一定的权力和社会地位。但是若试图仅以这点来概括一切,似有见树不见林之憾。本文有鉴于此,不仅立基于传统的社会语言学理论,更试图从“法律论述”(discourseanalysis)理论出发接近该问题,因为“法律论述”关心法律语言作为一种语言变体,其实际运用的场合与情境,牵动着诸多内外在、主客观的因素,一如国外的陪审团审判制度所显示。笔者在本文绪论中提出轮廓之后,接着第二部分再介绍语言的功能和作用并适时引入法律语言。继而第三部分围绕法律语言作为一种“语体”或“语码”(code)或“变体”(variety)的论点,针对诸多相关的社会语言学的复杂因素和理论,进行论述与比较。