Csiszar’s ϕ-divergences for testing the order in a Markov chain

x ₁, ..., x _n+r can be treated as the sample values of a Markov chain of order r or less (chain in which the dependence extends over r+1 consecutive variables only), and consider the problem of testing the hypothesis H ₀ that a chain of order r− 1 will be sufficient on the basis of the tools given by the Statistical Information Theory: _ϕ-Divergences. More precisely, if p _{a 1 ....., a r}: _{a r +1} denotes the transition probability for a r ^th order Markov chain, the hypothesis to be tested is H ₀:p _{a 1 ....., a r}: _{a r +1} = p _{a 2 ....., a r}: _{a r +1}, a _i ∈{1, ..., s}, i = 1, ..., r + 1 The tests given in this paper, for the first time, will have as a particular case the likelihood ratio test and the test based on the chi-squared statistic. Received: August 3, 1998; revised version: November 25, 1999     

The association between job skill discretion, decision authority and burnout

This paper reports on the relationship between dimensions of control (skill discretion and decision authority) and burnout (emotional exhaustion, depersonalization, and reduced personal accomplishment) among 164 human service workers. It examines the differential influence of job demands, control (skill discretion and decision authority) and social support (supervisor, co-workers, others) on each burnout dimension. Then it examines the moderating effects of higher skill discretion, higher decision authority, and higher social support on burnout. Low skill discretion was found to be associated with high emotional exhaustion and depersonalization and low personal accomplishment. The effects of decision authority were not statistically significant. High job demands were associated with high emotional exhaustion only. Social support (supervisor, co-worker, and others) was not associated with burnout when demographic variables and job characteristics were controlled for. Neither dimension of control moderated the impact of high job demands on burnout. Social support did not moderate the impact of high demands, low skill discretion, or low decision authority on any burnout dimension. The full model explained 44% of the variance in emotional exhaustion, 25% in depersonalization, and 42% in personal accomplishment. Despite its limitations, the study suggests that the Job Demand-Control model may provide a useful theoretical foundation for the study of burnout, but that the control dimensions need to be evaluated independently since they appear to be differentially related to the burnout dimensions.     

Employee reactions to behavioural control under conditions of stress: the moderating role of self-efficacy

Extensive research conducted in the occupational stress literature has failed to provide convincing support for the stress-buffering effects of work control on employee adjustment. Drawing on research conducted in the laboratory context, it was proposed that the stress-buffering effects of work control on employee adjustment would be more marked at high, rather than low, levels of self-efficacy. In a sample of 100 customer service representatives, a significant three-way interaction among role conflict, work control and self-efficacy (measured at Time 1) was observed on (low) depersonalization (measured at Time 2). Consistent with expectations, work control reduced the negative effects of work stress on this outcome measure only for employees who perceived high levels of self-efficacy at work. In addition, there was evidence to suggest that self-efficacy moderated the main effects of work control on job satisfaction and somatic health. These findings are discussed in terms of their theoretical contribution to the job strain model, and also in relation to workplace interventions designed to improve levels of employee adjustment.     

Robust models in probability sampling

In the estimation of a population mean or total from a random sample, certain methods based on linear models are known to be automatically design consistent, regardless of how well the underlying model describes the population. A sufficient condition is identified for this type of robustness to model failure; the condition, which we call 'internal bias calibration', relates to the combination of a model and the method used to fit it. Included among the internally bias-calibrated models, in addition to the aforementioned linear models, are certain canonical link generalized linear models and nonparametric regressions constructed from them by a particular style of local likelihood fitting. Other models can often be made robust by using a suboptimal fitting method. Thus the class of model-based, but design consistent, analyses is enlarged to include more realistic models for certain types of survey variable such as binary indicators and counts. Particular applications discussed are the estimation of the size of a population subdomain, as arises in tax auditing for example, and the estimation of a bootstrap tail probability.     

基于信任的建筑业CP链知识共享研究

信任对建筑业相关知识的流动与共享起着决定性作用。而建筑流程（Construction Process，CP）的不同平台也使得知识的共享必不可少。论文分析了建筑业各参与主体间的信任框架，建立一条完整的知识流动链，并构建了建筑业实施知识共享的三个有效平台。     

Undergraduate public relations education in Spain: Endangered species?

The purpose of this article is to analyze the precarious situation concerning undergraduate public relations education in Spain, despite the existence of a Degree in Advertising and Public Relations. In addition to core subjects, which are set by the government and required on all university curricula, the Spanish system allows universities to complete their curriculum with other compulsory and elective courses. Given this freedom, universities have failed to come up with either the specific contents for public relations or for liberal arts, social sciences and business courses that will enable students to enter the profession. In light of the future restructuring of degrees through the Bologna Process, this situation is a serious threat to the continuity of public relations teaching in Spanish universities.     

试论如何完善企业内部控制

本文从内部控制的基本理论出发,在对内部控制作了多层面理解的基础上,从控制环境、会计责权控制及内部审计等三个方面对我国企业现阶段内部控制存在的问题进行了分析,并探究其原因。最后提出只有在采取规范法人治理结构、建立适当的内部激励机制、提高内部审计的独立性与权威性等措施之下,我国企业内部控制才能达到一个新的高度,才能真正意义上发挥作用。     

关于城镇人口就业的发展趋势与人口控制

本文阐述了人口就业在机制、渠道、就业压力等方面的发展趋势，并提出了顺应发展需要所必须选择的人口控制的若干措施和建议     

定位误差的简明计算研究

主要阐述了定位误差的基本概念和分析计算方法，并举例说明其运用.