This contribution seeks to shed new light onto the classification of legal orders with respect to the domestic effect of international law. Traditional theory distinguishes between monist and dualist systems, those that accept the primacy of international law over domestic law, and those that do...

More than one hundred years ago, the U.S. Supreme Court started to refer to social science evidence in its judgments. However, this has not resonated with many constitutional courts outside the United States, in particular in continental Europe. This contribution has a twofold aim. First, it...

It is often observed in the literature on customary international law that the identification practice of the International Court of Justice for customary norms deviates from the traditional definition of customary law in Art. 38 (1) lit. b of the ICJ Statute. However, while there are many...

More than one hundred years ago, the U.S. Supreme Court started to refer to social science evidence in its judgments. However, this has not resonated with many constitutional courts outside the United States, in particular in continental Europe. This contribution has a twofold aim. First, it...

It is often observed in the literature on customary international law that the identification practice of the International Court of Justice for customary norms deviates from the traditional definition of customary law in Art. 38 (1) lit. b of the ICJ Statute. However, while there are many...

More than one hundred years ago, the U.S. Supreme Court started to refer to social science evidence in its judgments. However, this has not resonated with many constitutional courts outside the United States, in particular in continental Europe. This contribution has a twofold aim. First, it...