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Digitization has changed economic activity in many ways. While digitization has contributed to a very dynamic development of markets and competition, concerns are also being expressed about powerful positions of some companies. The digital transformation poses new challenges for companies, consumers, politics and society. Competition policy is also required to address these developments and to adapt existing competition law, if necessary. The following analysis of digital markets showed that it is not possible, in general, to make concrete competition policy statements or even to give detailed recommendations for the antitrust analysis. The aspects are to be considered separately and in detail when examining search engines, social networks, trading platforms and other business models. On the other hand, data (and data analysis) should stand in the centre of competition law analysis due to their importance for the economic success of digital market companies.

Abstract
The article investigates whether there is a need for legislative action in social networks—which are similar to broadcasting—to ensure that diversity of opinion can be sufficiently expressed to protect freedom of opinion-forming. The investigation focuses on Facebook because it has the largest number of registered users worldwide and is thus the network with the greatest reach. First and foremost, it will be debated whether social networks have a power of opinion comparable to broadcasting. Based on this foundation, it is possible to assess the extent to which diversity of opinion is expressed in social networks and the extent to which freedom to form opinions is actually under threat.

Abstract
The redesign of data protection in the police and judicial area is intended to create uniformity at the European level for the citizens of EU Member States. This scientific article analyses the subject of data protection in law enforcement and judicial cooperation in criminal matters. The focus is primarily on the existing provisions and the latest developments of the EU with regard to Directive (EU) 2016/680 on the protection of natural persons with regard to the processing of personal data by competent authorities for the purposes of the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, and on the free movement of such data, and repealing Council Framework Decision 2008/977/JHA. The international level with regard to data protection in the police and judicial area and possible changes due to the developments in data protection under European law are also examined in more detail.

Various internet platforms have rapidly developed into central points of everyday life, for private individuals as well as for companies (often dominated by a single or a few companies). At the same time these internet platforms are advancing into more and more areas of business. This creates the risk of dependency, abuse of power, manipulation, concentration of power, centralization of data and information with corresponding effects on technological development, innovation, economy, society and politics. From an economic point of view, this article examines how the strong market positions of internet platforms arise and can be maintained. The dynamics of these technology and innovation-driven markets and the differences from conventional markets are also discussed. These internet markets have emerged from a series of innovations and are characterized by rapid technological development. Taking into account the economic peculiarities as well as knowledge from innovation and governance research, recommendations are drawn up on how these problems can be dealt with.