普通话水平测试“语调偏误”的学理与界定

在普通话水平测试（PSC）中,＂语调偏误＂一直是学界研究的重点与测试员评分的难点。对＂语调偏误＂学理的理解应以中介语理论为基础;评分实践中,应确立以方言性质的偏误为主要视角,注重系统性考察,采用定性为主的方法全面评定应试人的语调偏误状况。     

Time series analysis of categorical data using auto-mutual information

Despite its importance, there has been little attention in the modeling of time series data of categorical nature in the recent past. In this paper, we present a framework based on the Pegram's [An autoregressive model for multilag Markov chains. Journal of Applied Probabability 17, 350–362] operator that was originally proposed only to construct discrete AR(p$p$) processes. We extend the Pegram's operator to accommodate categorical processes with ARMA representations. We observe that the concept of correlation is not always suitable for categorical data. As a sensible alternative, we use the concept of mutual information, and introduce auto-mutual information to define the time series process of categorical data. Some model selection and inferential aspects are also discussed. We implement the developed methodologies to analyze a time series data set on infant sleep status.     

A robust Liu regression estimator

The least-squares regression estimator can be very sensitive in the presence of multicollinearity and outliers in the data. We introduce a new robust estimator based on the MM estimator. By considering weights, also the resulting MM-Liu estimator is highly robust, but also the estimation of the biasing parameter is robustified. Also for high-dimensional data, a robust Liu-type estimator is introduced, based on the Partial Robust M-estimator. Simulation experiments and a real dataset show the advantages over the standard estimators and other robustness proposals.     

Oracle inequalities for the Lasso in the additive hazards model with interval-censored data

This article studies the absolute penalized convex function estimator in sparse and high-dimensional additive hazards model. Under such model, we assume that the failure time data are interval-censored and the number of time-dependent covariates can be larger than the sample size. We establish oracle inequalities based on some natural extensions of the compatibility and cone invertibility factors of the Hessian matrix at the true parameters in the model. Some similar inequalities based on an extension of the restricted eigenvalue are also established. Under mild conditions, we prove that the compatibility and cone invertibility factors and the restricted eigenvalues are bounded from below by positive constants for time-dependent covariates.     

Organization without actorhood: Exploring a neglected phenomenon

Most scholars explicitly or implicitly build on the assumption that organizations have to be externally recognized as actors to become constituted as organizations. Although recently some scholars have reported on instances of organization without actorhood, the phenomenon still remains widely neglected. Moreover, so far, organization without actorhood is seen as something very limited in terms of complexity and permanency. In this paper, we will draw a different picture. Drawing on the concept of degrees of organizationality (Dobusch & Schoeneborn, 2015) and a decision-based understanding of organization (Ahrne & Brunsson, 2011; Luhmann, 2003), we develop a framework that allows us to explore how much organization is possible without actorhood. Drawing on a qualitative case study of an inter-organizational collective concerned with ensuring public safety, we illustrate that highly complex organization is possible without constituting an actor. Our study presents evidence contradicting the common assumption that complex organization relies on the external attribution of actorhood. We also add to debates on responsibility of organizations and inter-organizational relations by pointing out that organization without actorhood has certain implications, i.e. it allows for a specific avoidance of responsibility.     

On the fruitfulness of the concept of partial organization: A rejoinder to Apelt et al.

This short paper responds to Apelt et al.’s (2017) comments on Ahrne et al.'s (2016) proposal of extending the concept of organization to any decided social orders and thereby putting organization studies at the centre of the social sciences. We highlight some misunderstandings about the aims of this proposal and discuss Apelt et al.’s own proposal of re-focusing organization studies on formal organizations based on Niklas Luhmann's systems theory.     

Crowdfunding through a partial organization lens – The co-dependent organization

Crowdfunding has become a rapidly growing source of alternative financing for a wide range of products and service ideas. The crowdfunding process itself necessitates the successful interaction between a number of actors including the central organizing platform, a number of content providing campaigns, and a large diverse group of funders. By utilizing the literature on complete and partial organizations and rejecting the commonly applied organizational molds to describe the process, this paper proposes that crowdfunding is organized and enabled as a fluid and co-dependent interaction between the various actors. The concept of partial organizations and its emphasis on key organizational decisions reveal that crowdfunding may be conceived of as a “co-dependent organization” in which the relationship of the involved actors is so interdependent that the crowdfunding process can neither be maintained nor implemented without it.     

Effect of Pet Dogs on Children's Perceived Stress and Cortisol Stress Response

The present study tested whether pet dogs have stress‐buffering effects for children during a validated laboratory‐based protocol, the Trier Social Stress Test for Children (TSST‐C). Participants were 101 children aged 7–12 years with their primary caregivers and pet dogs. Children were randomly assigned in the TSST‐C to a pet present condition or one of two comparison conditions: parent present or no support figure present. Baseline, response, and recovery indices of perceived stress and cortisol levels were computed based on children's self‐reported feelings of stress and salivary cortisol. Results indicated that in the alone (no social support) condition, children showed the expected rise for both perceived stress and cortisol response to stress. Pet dog presence significantly buffered the perceived stress response in comparison to children in the alone and parent present conditions. No main condition effect was observed for cortisol; however, for children experiencing the stressor with their pet present, lower cortisol response to stress was associated with more child‐initiated petting and less dog proximity‐seeking behavior. The results support the notion that pet dogs can provide socio‐emotional benefits for children via stress buffering.     

Partial Identification in Triangular Systems of Equations With Binary Dependent Variables

This paper studies the special case of the triangular system of equations in Vytlacil and Yildiz (2007), where both dependent variables are binary but without imposing the restrictive support condition required by Vytlacil and Yildiz (2007) for identification of the average structural function (ASF) and the average treatment effect (ATE). Under weak regularity conditions, we derive upper and lower bounds on the ASF and the ATE. We show further that the bounds on the ASF and ATE are sharp under some further regularity conditions and an additional restriction on the support of the covariates and the instrument.     

FDI对我国经济增长的影响分析及检验

改革开放以来,我国经济得到迅速发展。外商直接投资(Foreign Direct Investment,以下简称FDI)的引入规模逐渐扩大,成为我国投资资金的重要来源之一。随着改革的不断深入,实际使用的FDI对我国经济发展的影响也在发生着变化。为研究FDI对我国经济增长的实际影响,结合FDI对东道国经济影响研究的相关文献,通过协整检验、Granger因果检验和误差修正模型,对我国1983—2010年间实际使用FDI与我国经济增长之间的长期和短期关系分别进行实证分析。结果表明,无论从长期还是短期来看,实际使用FDI对我国经济增长都有一定的正向促进作用。