“…Other research looks authoritarian states and finds that there is significant variation in the participation behavior among them (e.g., Leinaweaver, 2012;Mattes and Rodríguez, 2014). Further influences at the domestic level pertain to interest groups and veto players (e.g., Fredriksson and Gaston, 2000;Roberts, Parks and Vásquez, 2004;Bernhagen, 2008;Urpelainen, 2010;Bernauer, Böhmelt and Koubi, 2013;Hugh-Jones, Milewicz and Ward, 2016), electoral systems, election periods and constitutional institutions (e.g., Cazals and Sauquet, 2015;Kelley and Pevehouse, 2015;Kiesow Cortez and Gutmann, 2015), income levels (e.g., Bernauer et al, 2010;Haftel and Thompson, 2013), and military or economic power aspects (e.g., Elsig, Milewicz and Stürchler, 2011;Haftel and Thompson, 2013;Milewicz and Elsig, 2014).…”