“…Previous research on constitutional change has been occupied, with few exceptions (for example, Behnke and Benz, ; Contiades, ; Oliver and Fusaro, ), with studying either explicit or implicit constitutional change – the one or the other. As a result, we know quite a bit about how often constitutions are amended and what explains variation in amendment frequency (Ferejohn, ; Lutz, ; Rasch and Congleton, ; Roberts, ). We also have some knowledge about what different forms implicit constitutional change may take (Rasch and Congleton, ; Voigt, 1999a), and how important courts have been as drivers for implicit change (Benz, ).…”