Unternehmer koennen eine aktive Rolle in ihren eigenen Unternehmen spielen: Sie sind dann gleichzeitig Eigentuemer, Fuehrungskraft und stehen in der operativen Verantwortung. Fuer das UEberleben der Unternehmen sind Innovationen essentiell: Ohne Innovation entsteht kein Produkt. Wie sich...

Employment growth is strongly predicted by smaller average establishment size, both across cities and across industries within cities, but there is little consensus on why this relationship exists. Traditional economic explanations emphasize factors that reduce entry costs or raise...

Im Zuge der Globalisierung und Beschleunigung des Wettbewerbs wird die schnelle und kostenguenstige Entwicklung von Produkten bis zur Marktreife zunehmend zu einem zentralen Wettbewerbsfaktor. Dies gilt im besonderen Masse fuer die pharmazeutische Industrie, in der die Ausgaben fuer Forschung &...

The decade of the 1940s was one of the darkest periods in the country's history, with years of famine, repression, general misery, and impoverishment of all aspects of national life ranging from culture to the economy. During those years plans were made to establish a Spanish motor industry once...

A turnaround in the way we convert and consume energy is the key to successful climate change mitigation. Taking a micro-economic perspective, in order to put the necessary changes into practice corporations in the energy sector need not only have a long-term vision of the developments necessary...

In relativ kurzer Zeit haben Open Source-Projekte als selbst organisierte, informale (Arbeits-)Netzwerke freiwillig Arbeitender, die durch eine rechtlich spezifische Lizenz ein „oeffentliches Gut“ erstellen, neben kommerzieller Software eine hohe Bedeutung erlangt. In dieser Arbeit wird die...

This paper presents an Optimised Search Heuristic that combines a tabu search method with the verification of violated valid inequalities. The solution delivered by the tabu search is partially destroyed by a randomised greedy procedure, and then the valid inequalities are used to guide the...

To understand whether retailers should consider consumer returns when merchandising, we study how the optimal assortment of a price-taking retailer is influenced by its return policy. The retailer selects its assortment from an exogenous set of horizontally differentiated products. Consumers...

Revenue management practices often include overbooking capacity to account for customers who make reservations but do not show up. In this paper, we consider the network revenue management problem with no-shows and overbooking, where the show-up probabilities are specific to each product....

The choice network revenue management (RM) model incorporates customer purchase behavior as customers purchasing products with certain probabilities that are a function of the offered assortment of products, and is the appropriate model for airline and hotel network revenue management, dynamic...