“…Beyond the research on different types of opposition and the different features to distinguish among them, most of the existing studies on parliamentary oppositions focus on relatively few cases (see, eg Andeweg et al, 2008 ; Church & Vatter, 2009 ; Christiansen & Damgaard, 2008 ; Gel’man, 2005 ; Helms, 2004 ; Inoguchi, 2008 ; Kaiser, 2008 ; Kopecky & Spirova, 2008 ; Mujica & Sanchez-Cuenca, 2006 ; Schrire, 2008 ) or do not look at political regimes beyond one specific type of democracy. Studies focus either on parliamentary democracies (see, eg Garritzmann, 2017 ; Schnapp & Harfst, 2005 ; Sieberer, 2011 ) or on presidential ones (see, eg Morgenstern et al, 2008 ).…”