The rise of a crisis-prone banking sector and its political power has received significant attention following the most recent financial crisis. The crisis sparked a growing interest in understanding how and why we have created a world of large, unstable banks. Excessive banking activity arose...

This thesis strives to offer new insights in two main areas. First, in the well-researched domain of payment cards chapters 2 and 3 investigate an aspect that has hitherto been scantly examined, namely, the fact that merchant usage fees differ substantially among merchant sectors. Additionally,...