Complementing Clusters: A Competitiveness Rationale for Infrastructure Investments Amir Sasson 1 BI Norwegian Business School Nydalsvn. 37 N-0442, Oslo Norway amir.sasson@bi.no +47 46410621 Torger Reve BI Norwegian Business School Nydalsvn. 37 N-0442, Oslo Norway torger.reve@bi.no +47 46410485 1 Corresponding author 1