Estimation of General Stationary Processes by Variable Length Markov Chains

We develop new results about a sieve methodology for the estimation of minimal state spaces and probability laws in the class of stationary processes defined on finite categorical spaces. Using a sieve approximation with variable length Markov chains of increasing order, we show that an adapted version of the Context algorithm yields asymptotically correct estimates for the minimal state space and for the underlying probability distribution. As a side product, the method of sieves yields a nice graphical tree representation for the potentially infinite dimensional minimal state space of the data generating process, which is very useful for exploration of the memory.     

液体的月光——中国古典诗歌中月光表达之管见

中国文学中液体月光意象的表达方式在盛唐以前已经出现,但其种类的增多和用词的丰富变化,却是出现在中晚唐,此后基本定型并被广泛接受,这与中国自古以来就有将月亮和水联系在一起的信仰有关.用来表达液体月光意象的文学词语从古到中晚唐主要有流、盈、满、金波、月波、如水、溢、湿、似水、浸、洗、濯、漉漉等,与月亮意象密切联系的其他意象主要有蟾蜍即是虾蟆、露和明水等.     

Building the Complementary Board. The Work of the Plc Chairman

This article addresses the critical issue of board effectiveness, and in particular the conditions under which chairmen as well as other non-executives can make an effective and positive contribution to the strategic direction and control of companies. It is informed by qualitative interview-based research with chairmen, chief executives and non-executive directors in major UK companies which focused on the now typically separate role and work of the company chairman. The article argues that in the governance debate too much attention has been given to issues of board structure and composition to the neglect of issues related to the knowledge and motives of individual non-executives, and how their energies are combined in processes of board accountability. Drawing upon directors’ experiences, the article examines the bases that underpin and the positive potential of what are termed ‘complementary’ board relationships, through which a chairman can contribute directly to the performance of the chief executive, as well as create the conditions for other non-executives to contribute to the performance of the executive team. The article also explores the negative dynamics of what are termed ‘complimentary’ relationships between executives and non-executive directors and how these sometimes inadvertently come to weaken board accountability and create the conditions for an external crisis of confidence.     

Recruitment on the Net: How Do Organizational Web Site Characteristics Influence Applicant Attraction?

The use of organizational web sites for recruitment has become increasingly common. Despite their widespread growth, however, little is known about how these web sites influence recruitment outcomes. In the current paper, we present a model that explicates how job seekers interact with and respond to web site characteristics to predict various job seeker attitudes and behaviors. We suggest that job seekers are initially affected by the facade of a web site, comprised of the web site’s aesthetic and playfulness features. Coupled with system features of the web site, these initial affective reactions then influence perceptions of the usability of the web site. Perceptions of usability and affective reactions work through two key mediating constructs, job seeker search behavior and web site attitude, to ultimately predict applicant attraction. Throughout the paper we present a series of testable propositions that should serve to guide future research.     

A Framework for Practising Knowledge Management

The management of an intangible asset such as knowledge is beset with complex and theoretical concepts. This paper sets out a matrix that describes four approaches to Knowledge Management based on whether it is in an organisational or an individual context, and whether knowledge management is imposed or empowered by managerial approaches. It explores the validity of the framework through an analysis of ongoing management projects at seven organisations.     

Effects of a self-efficacy intervention on initiation of recommended exercises in patients with spondylosis

An intervention designed to enhance preaction self-efficacy beliefs (i.e., beliefs about ability to initiate behavior despite anticipated barriers during the initiation period) was tested in patients with spondylosis in relation to initiation of exercises recommended by a consultant in orthopedic rehabilitation. Sixty patients (age 28-83 years; 44% men) with spondylosis who had not previously performed exercises recommended for degenerative spine diseases were randomly assigned to a control (education session) or intervention group. Three weeks later, intervention patients performed recommended exercises more frequently than controls. Regression analysis for all patients showed that preintervention, preaction self-efficacy predicted exercise. Age and preintervention self-efficacy moderated the intervention effects. Among older patients, only those with weak preintervention, preaction self-efficacy beliefs benefited from the intervention, whereas among younger patients, only those with strong preintervention, preaction self-efficacy beliefs benefited from the intervention.     

Social Problems,by Amitai Etzioni. Foundations of Modern Sociology Series. Prentice Hall,Englewood Cliffs,New Jersey, 1976. $3.95, Paper. 182 Pp.

Abstract

Publication productivity has received increasing attention in the social work literature. A major shortcoming of the social work literature on productivity is the paucity of attention given specifically to the publication efforts of ethnic minority social work educators. This article presents findings from the first national survey to specifically focus on publication productivity among African-American social work faculty. The data generated from the survey reveal that productivity is associated more with individual-level factors than structural factors, a minority of African-American faculty are producing most of the publications, and African-American social work faculty are producing slightly fewer publications than the broader population of social work faculty.