This paper explores the consequences for parametric and non-parametric efficiency levels and rankings when using grouped instead of individual Decision Making Units (DMU). The bias results due to the differences of the grouped DMUs frontier compared to the individual DMUs frontier. Monte Carlo...

In der deutschen Chemieindustrie ging die Zahl der Beschäftigten von 1992 bis 2004 deutlich zurück, und die durchschnittliche Unternehmensgröße sank von 824 auf 433 Beschäftigte. Die Triebfeder dieser Entwicklung war weniger die Beseitigung technischer oder organisatorischer Ineffizienzen....

German chemical manufacturing industry is marked by two major structural changes during 1992-2004. Firstly, number of firms was ranging extensively: from 676 to 901, while only 96 firms represented balanced panel. Secondly, size of the firm dropped considerably-by 88%. This paper is intended to...

Efficiency analyses on higher education institutions have so far primarily focussed on the identification of inefficiency and less on the explanation of differences in efficiency performance. In this article, we study the impact of institutional factors on the efficiency of 67 publicly financed...