The first issue of the Balkan Yearbook of European and International Law (BYEIL) focuses on international commercial and investment arbitration as one of the fastest developing fields of law in Southeast Europe. Covering a range of topics, the contributions analyze transparency and confidentiality in international commercial and investment arbitration in national, EU and international contexts. In addition, it compares the commercial arbitration laws and rules in Bosnia and Herzegovina with the international developments in this area.The papers published in the permanent sections on European Law and International Law explore contemporary challenges in public and private law disciplines, offering new perspectives on old concepts.