http://dx.doi.org/10.17176/20190324-211234-0 https://verfassungsblog.de/what-powers-at-what-level/ What Powers at What Level? Simon, Sven eng 2019-02-15 electronic resource text/html ddc:342 investment screening merger control Verfassungsblog Verfassungsblog--2366-7044 CC BY-NC-ND 4.0 How to allocate the powers to collect information, surveil and restrict investment between the EU and the Member States? This question has far reaching ramifications for the underlying political relationship between the EU and its Member States.