Superiority comparisons of homogeneous linear estimators

In the paper homogeneous linear estimators of the parameter vector of the general linear model are compared in terms of their MSE matrices. A necessary and sufficient condition for the difference of two MSE matrices to be positive definite is obtained and its practical existence discussed. The non-negative definiteness of the difference also receives attention, and conditions for this case are discussed. The absence of any conditions of the above type is taken into consideration as well.     

The dynamics of online news discussions: effects of news articles and reader comments on users’ involvement,willingness to participate,and the civility of their contributions*

This study investigates when and why news website visitors write civil or uncivil comments in response to news articles or related user comments. In an experiment, we manipulated the news value of news articles and the presence of ‘deliberative’ or ‘detrimental’ elements of comments to compare their impact on participants’ involvement, willingness to comment, and the comments they posted. News factors and comment characteristics increased participants’ willingness to comment via cognitive and affective involvement. Cognitive involvement made it less likely and affective involvement more likely that participants wrote uncivil comments. Additionally, involvement with previous comments increased participants’ willingness to comment on articles and vice versa. Results imply that news articles and comments dynamically shape the discussion value of online news.     

The politics of ideas in welfare state transformation: Christian Democracy and the reform of family policy in Germany

The expansion of employment-centered family policies of the Grand Coalition in Germany came with some surprise, as Christian Democrats have traditionally been strongly committed to the male breadwinner model and corresponding family policies. This article investigates why Christian Democrats (though with some inconsistencies) promoted “social-democratic” family policies guided by the adult worker rather than by the male breadwinner model. Illuminating the politics of recent family policy reforms, the electoral rationale for this modernization of family policy, the role of political entrepreneurship, and intraparty political conflicts over the new policy paradigm are discussed.     

Duality of weakly disposable technology

The axiom of weak disposability is frequently imposed in data envelopment analysis (DEA) models involving undesirable outputs such as pollution. This paper sheds new light on the economic interpretation of weak disposability by developing dual formulations of the weakly disposable DEA technology. We find that the economic implications of weak disposability on the multiplier DEA problem are two-fold: (1) the shadow prices of the undesirable outputs can be positive or negative, and (2) the economic loss of the benchmark cannot exceed the suck cost of the inputs. We interpret the second implications as a limited liability condition. The dual formulations developed in this paper enable one to estimate shadow prices of the undesirable outputs using the weakly disposable technology. The insights gained are illustrated by a numerical example and an empirical application to the US power plants.     

Wenn weiße Schafe krampfhaft nach schwarzen suchen ... und sich dabei dreckig machen! Replik auf den Beitrag von Jochen Gläser

Ohne Zusammenfassung     

THE EXPERIMENTS OF REDUCED WORKING HOURS IN FINLAND

This paper examines experiments of shorter working hours in Finnish municipalities between 1996 and 1998 in terms of the effects of the experiments on work–family interaction and which of the ways of reducing working time had the most positive effect. We analyse the experiment in respect of the Finnish working time regime, and in addition, from the perspective of community time. The analysis combines questionnaire and interview data. The results indicated that the experiment had a positive effect on work–family interaction. Six-hour shifts, in comparison to other forms of working time reductions, had the strongest impact on the decrease in conflict arising from work and affecting family. The interviews demonstrated various effects of the working time experiment on family, including the negative effects caused by unsocial working hours and the loss of time autonomy at work among the highly educated. Furthermore, reduced working hours in a culture based on the principle of full-time work caused some negative effects, such as feelings of guilt. The impact of the experiment on community time depended on the way the experiment was implemented.     

SMOOTH TRANSITION AUTOREGRESSIVE MODELS — A SURVEY OF RECENT DEVELOPMENTS

This paper surveys recent developments related to the smooth transition autoregressive (STAR) time series model and several of its variants. We put emphasis on new methods for testing for STAR nonlinearity, model evaluation, and forecasting. Several useful extensions of the basic STAR model, which concern multiple regimes, time-varying non-linear properties, and models for vector time series, are also reviewed.     

Use of Various Health Care Services by Students in Helsinki

Abstract

Review of the working of various health care schemes has revealed predominant use by a certain group of “large-scale consumers.” The concomitant use of various services (health, dental, and mental health care) was studied within the Helsinki Health Center of the Finnish Student Health Service from January 1, 1980 to August 31, 1980. The group consisted of 16,174 students. The characteristics of the groups of patients who used only the mental health care service and of those who used all three services were also studied. Within each sector, there were fewer patients than expected who did not use the services of other sectors. The number of patients visiting dental and health care services, mental health and health care services, and all three services were greater than expected. The groups of patients who used only the mental health care service and those who used all three services were surprisingly similar. The greatest difference between the groups probably lay in their need for somatic and dental care. The organization, which incorporates mental health, dental, and health care services in the same building offers improved possibilities for care of the patient as a whole. On the basis of this study, there is no reason to think that such an organization leads to misuse of the various services.