Electricity market design varies across countries throughout Europe. Thereby the provision and remuneration of flexibility always takes place in short-term market segments. Taking into consideration the fundamental changes of the power system, this paper discusses options for the future short-term market design. We develop a conceptual basis for a possible integration of currently separated short-term market segments. Market segment integration (MSI) is defined as the interaction between and possible combination of market segments, i.e. intraday market (ID), congestion management (CM) and balancing market (BA). The paper especially focusses on two options, namely an integrated BA and CM market and an integrated ID and CM market. For these options we determine the basic design features. We propose a criteria catalogue which allows the evaluation of the market design options. Based on several criteria we discuss possible positive and negative consequences as well as potential solutions

There are different flexibility options to align power systems to volatile feed-in of renewable electricity sources. The flexibility options differ in the dimensions of time, spatiality, and resource type. To make policy decisions on future energy systems, it is necessary to get a top-down indication of how much power system flexibility is needed. With the ongoing energy transition, there is yet no comprehensive overview of indicators that describe which dimension of flexibility will be necessary to what extent for different energy systems. Therefore, this paper provides a first overview of indicators that can be used to assess the necessity of power system flexibility. Thus, we do a systematic literature review to identify indicators that allow us to estimate the necessity of power system flexibility. We conduct a meta-analysis of these indicators and categorize them as indicators that either stand for an increasing or decreasing necessity of power system flexibility. Our paper can help inform policy, assess needed changes to system operations, increase stakeholder acceptance and investor confidence in implementing new technology and measures.

English In recent years there has been an increased interest in comparative social work in the UK and EU. The process of learning and teaching in this area needs to be supported by academic debate. Utilizing hermeneutics and reflective learning, we advance a theory of learning through comparison. French Un intérêt croissant pour la comparaison entre divers milieux de travail social s'est développé au cours des dernières années au Royaume Uni et en Europe. Les processus d'apprentissage et d'enseignement dans ce domaine ont besoin d'un support émanant de débats académiques. Utilisant l'herméneutique et l'apprentissage réflexif, nous avançons une théorie d'apprentissage par comparaison. Spanish Recientemente, en el Reino Unido y en los Estados Unidos, ha crecido el interés en trabajo social comparativo. El proceso de aprender y enseñar en esta Ärea debe ser apoyado en debate académico. Usando hermenéutica y aprendizaje reflexivo, los autores avanzan una teoría de aprendizaje a través de la comparación.