Die vorliegende Studie befasst sich mit dem Einsatz von digitalen Medien in B2B-Beschaffungsprozessen im deutschen Markt. Dieser wird in der existierenden Literatur nur unzureichend erfasst. Zum einen wird die Vielfalt digitaler Medien nicht berücksichtigt. Zum anderen werden die Heterogenität...

Platform-based systems have become the dominant way to market consumer entertainment products. Video games are, for instance, distributed in digital data form, which can only be used on compatible hardware. Network effects drive the diffusion of such systems. This article provides insights into...

This paper focuses on several estimation methods for SAR- models in case of missing observations in the dependent variable. First, we show with an example and then in general, how missing observations can change the model and thus resulting in the failure of the 'traditional' estimation methods....

Following liberalization and especially the energy transition, energy infrastructures are developing rapidly and significantly. Electricity networks are expanded to facilitate connection of renewable energies and new load such as heat pumps and electric mobility. On the one hand, gas networks...

The electricity grid includes multiple network areas managed by different operators, with transmission system operators (TSOs) handling high-voltage areas and distribution system operators managing midto low-voltage areas. These areas are interconnected and synchronized, creating classical...

In this paper, a Poisson gravity model is introduced that incorporates spatial dependence of the explained variable without relying on restrictive distributional assumptions of the underlying data generating process. The model comprises a spatially filtered component - including the origin,...

This paper focuses on several estimation methods for SAR- models in case of missing observations in the dependent variable. First, we show with an example and then in general, how missing observations can change the model and thus resulting in the failure of the 'traditional' estimation methods....