Doing Our Own Housekeeping:

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The puzzles of daily life: The temporal orders of families when parents have non-standard work schedules

This article investigates the temporal orders of families as the daily rhythms and schedules when one or both parents work non-standard hours. Our focus is especially on the often asynchronous times of non-standard work, on one hand, and of early childhood education and care (ECEC) services and other institutions, on the other hand. The data consist of semi-structured qualitative interviews of Finnish parents with a four-year-old child. The results show that the asynchronous times generated by non-standard working hours cause a wide range of collisions both in relation to childcare and ECEC and to the division of labour between parents. The parents are ‘wrestling’, not only because of the asynchrony of their own work but also because of the ‘pedagogical rhythm’ created by ECEC professionals. However, the parents also find ways to manage time, facilitated by workplace flexibility or spousal negotiations over the sharing of responsibilities.     

Social positioning theory and quantum mechanics

Social positioning theory, or an account of the human individual that it grounds, qualifies as a quantum social theory. This is an assessment that I explain and defend in the paper. It is of interest in that, in a world where increasing numbers are seeking to construct quantum social theories, it serves to help demonstrate that this goal can be achieved without giving up on meeting criteria like explanatory intelligibility or power or discarding real-world notions like human (and other) entities. As it turns out, a central feature of the account defended and a core element of the ‘standard’ interpretation of quantum mechanics are found to stand in an interesting, unanticipated and suggestive relation to each other.     

Counselor Actions to Facilitate Client Change During Life-Design Counseling

The authors examined whether and how counselor interventions foster client change during life-design counseling (Savickas, 2015). Two counseling sessions were conducted. Interviews with the 2 clients and the counselor after each counseling session were done in accordance with interpersonal process recall (Larsen, Flesaker, & Stege, 2008). The results indicated a scheme of counselor interventions that corresponded to client change. Specifically, the counselor fostered client reflection and reflexivity by (a) exploring original constructions, (b) identifying problematic themes in the constructions, (c) interpreting those themes, (d) identifying and recording client change and reflection, (e) connecting the themes to current issues, (f) facilitating a process of critical review, and (g) facilitating the reconstruction process. The results add a counselor's perspective to the research on client change and suggest a study of cases facilitated by counselors with diverse styles and skills that could further identify links between client change and counselor intervention.     

Robust multivariate change point analysis based on data depth

Modern methods for detecting changes in the scale or covariance of multivariate distributions rely primarily on testing for the constancy of the covariance matrix. These depend on higher-order moment conditions, and also do not work well when the dimension of the data is large or even moderate relative to the sample size. In this paper, we propose a nonparametric change point test for multivariate data using rankings obtained from data depth measures. As the data depth of an observation measures its centrality relative to the sample, changes in data depth may signify a change of scale of the underlying distribution, and the proposed test is particularly responsive to detecting such changes. We provide a full asymptotic theory for the proposed test statistic under the null hypothesis that the observations are stable, and natural conditions under which the test is consistent. The finite sample properties are investigated by means of a Monte Carlo simulation, and these along with the theoretical results confirm that the test is robust to heavy tails, skewness and high dimensionality. The proposed methods are demonstrated with an application to structural break detection in the rate of change of pollutants linked to acid rain measured in Turkey lake, a lake in central Ontario, Canada. Our test suggests a change in the rate of acid rain in the late 1980s/early 1990s, which coincides with clean air legislation in Canada and the US. The Canadian Journal of Statistics 48: 417–446; 2020 © 2020 Statistical Society of Canada     

Multivariate trimmed means based on the Tukey depth

In univariate statistics, the trimmed mean has long been regarded as a robust and efficient alternative to the sample mean. A multivariate analogue calls for a notion of trimmed region around the center of the sample. Using Tukey's depth to achieve this goal, this paper investigates two types of multivariate trimmed means obtained by averaging over the trimmed region in two different ways. For both trimmed means, conditions ensuring asymptotic normality are obtained; in this respect, one of the main features of the paper is the systematic use of Hadamard derivatives and empirical processes methods to derive the central limit theorems. Asymptotic efficiency relative to the sample mean as well as breakdown point are also studied. The results provide convincing evidence that these location estimators have nice asymptotic behavior and possess highly desirable finite-sample robustness properties; furthermore, relative to the sample mean, both of them can in some situations be highly efficient for dimensions between 2 and 10.     

笔记本电脑品牌竞争力探究——以烟台、威海两市为例

利用访谈法调查了300名消费者和10个笔记本电脑知名品牌的核心经销商,得到了一系列品牌竞争力的指标数据,运用主成分分析和逐步回归方法对烟台、威海两地的笔记本电脑品牌竞争力进行了分析。结果发现：惠普、华硕、联想稳坐三甲,卖价6000~8000元人民币的产品是主流,宽屏笔记本占据整体市场八成以上的关注份额;14．1英寸占据整体市场60％以上关注比例;双核是关注焦点,酷睿2垄断近五成关注度。     

Information in Securities Markets: Kyle Meets Glosten and Milgrom

This paper analyzes models of securities markets with a single strategic informed trader and competitive market makers. In one version, uninformed trades arrive as a Brownian motion and market makers see only the order imbalance, as in Kyle (1985). In the other version, uninformed trades arrive as a Poisson process and market makers see individual trades. This is similar to the Glosten–Milgrom (1985) model, except that we allow the informed trader to optimize his times of trading. We show there is an equilibrium in the Glosten–Milgrom‐type model in which the informed trader plays a mixed strategy (a point process with stochastic intensity). In this equilibrium, informed and uninformed trades arrive probabilistically, as Glosten and Milgrom assume. We study a sequence of such markets in which uninformed trades become smaller and arrive more frequently, approximating a Brownian motion. We show that the equilibria of the Glosten–Milgrom model converge to the equilibrium of the Kyle model.     

Leaders, followers, and time

In order to consider leadership from a temporal perspective, we examine extant leadership research that refers to temporal variables in its theorizing and/or empirical testing. We consider rhythmic patterns manifested in leader and follower behavior and employ entrainment, polychronicity, pace/speed, punctuality, and temporal depth as categorization concepts for the analysis. Further, we propose general theoretical statements about temporal dimensions and their prospective roles in relationships and processes related to leadership.