In projects with a flexible project structure, the activities that have to be scheduled are not completely known beforehand. Instead, scheduling such a project includes the decision whether to carry out particular activities at all. This also effects precedence constraints between the finally...

Emissions trading schemes on entity level are becoming more and more important in the context of controlling greenhouse gases. The directive on a Europe-wide trading scheme is a prime example. Prior to the start of such a scheme, a number of design features have to be agreed upon. Regarding the...

Due to tight public budget constraints, the efficiency of publicly financed universities in Germany is receiving increasing attention in the academic as well as in the public discourse. Against this background we analyze the efficiency of 72 public German universities for the years 1998 to 2003,...

Die Qualität von Produkten und Dienstleistungen steht seit einiger Zeit im Mittelpunkt entsprechender Verbesserungsbemühungen, woraus sich entsprechende Konzepte für das Qualitätsmanagement ebenso wie für das Qualitätscontrolling entwickelt haben. Dabei ist Qualität nun wahrlich keine...

Multivariate Tobit models are estimated using German cross?sectional data to test whether strategic complementarities exist between expenditures in four different types of ICT?components. If two ICT?components are complements, they are correlated (provided that agents act rationally)....

The aim of this paper is to analyse the effects of knowledge management on the innovation success of firms in Germany. Using a matching procedure on data from the German Innovation Survey of 2003 (Mannheim Innovation Panel), we pair firms applying knowledge management with twin firms with...

This Working Paper gives insights into the concepts of productivity and efficiency. Both concepts are popular measures for evaluating productive units, either on macro or micro level. This paper provides clear definitions for both concepts and outlines key areas of interest in this context, such...

Services are characterised by the integration of customers while the service is produced. This integration leads to interruptions in the processing of a customer order until the customer provides the missing input. Since customer behaviour can be planned to a certain extent only challenges in...