Shrinkage Estimation Strategies in Generalised Ridge Regression Models: Low/High-Dimension Regime

In this study, we suggest pretest and shrinkage methods based on the generalised ridge regression estimation that is suitable for both multicollinear and high-dimensional problems. We review and develop theoretical results for some of the shrinkage estimators. The relative performance of the shrinkage estimators to some penalty methods is compared and assessed by both simulation and real-data analysis. We show that the suggested methods can be accounted as good competitors to regularisation techniques, by means of a mean squared error of estimation and prediction error. A thorough comparison of pretest and shrinkage estimators based on the maximum likelihood method to the penalty methods. In this paper, we extend the comparison outlined in his work using the least squares method for the generalised ridge regression.     

Wird die Konjunkturkomponente der Schuldenbremse ihrer Aufgabe noch gerecht?

Wirtschaftsdienst - In der Debatte um die Schuldenbremse geht es zumeist um eine Grundgesetzänderung. Dabei ist ein wesentlicher Teil der Schuldenbremse — die Konjunkturkomponente,...     

The effect of entrepreneurship education in schools on entrepreneurial outcomes: a systematic review

Management Review Quarterly - This study systematically reviewed 21 quantitative and qualitative articles on the effect of entrepreneurship education in schools. We reviewed short-term effects,...     

Libra — A Differentiated View on Facebook’s Virtual Currency Project

Intereconomics - Libra — a global virtual currency project initiated by Facebook — has been the subject of many controversial discussions since its announcement in June 2019. This paper...     

Service Delivery Networks and Employment Relations at German Airports: Jeopardizing Industrial Peace on the Ground?

In this article, we ask how organizational restructuring towards a network form of service delivery challenges an established form of employment relations in Germany, that is labour–management collaboration. Building on a theoretical discussion of the marketization hypothesis, we develop a structuration perspective on the relationship between network restructuring and labour–management collaboration, which highlights the political economy of inter-firm networks. Empirically, we focus on two major airport authorities in Germany. Our findings show how these authorities at the core of service delivery networks face a strategic trade-off between short-term labour cost reductions and more adversarial employment relations. Apart from coinciding with a deterioration in working conditions for service workers, the handling of this trade-off depends on managers’ and worker representatives’ commitment to collaboration across the network. While unions and works councils initially continued with social partnership-type practices, the more adversarial management practices for enacting the network restructuring cause a fragmentation on the workers’ side and increase the conflict potential. We conclude that the agency of management and worker representatives in the enactment of inter-firm networks oscillates between more partnership-like and more conflictive practices, which turn the network restructuring into a political process with divergent outcomes for employment relations.