In this volume, notable authors discuss the influence of EU public procurement law on national - especially German - social security systems. Background is the decision Oymanns vs. AOK of the Court of Justice of the European Union (ECJ). In consequence of the judgement, national social insurance carriers will be forced to more often tender goods and services they receive from third parties in fulfilling their purposes. This gives rise to a series of legal questions to be dealt with at local courts in near future.The contributions deal with the immediate consequences of the decision Oymanns vs. AoK for the social insurance carriers. In addition to that the influence of EU anti trust law on the systemsof social security of the member states of the EU is discussed.weiterlesen