“…Similarly, it must be taken into account that in Spain there are also many legislative chambers under a complex multilevel political system that in fact works as a federal system and generates many interdependencies between levels of government (Field, 2009;León, 2014;Rodden and Wibbels, 2011;Toboso and Scorsone, 2015). These interactions do in fact also influence electoral results and the final share of seats as well as emerging public policies (Pallarés and Keating, 2003;Leon, 2012;Sanguinetti and Tomassi, 2004;Rodden, 2002;Toboso 2005Toboso , 2006Knutsen, 2011). Finally, to clearly state that our research endeavour is not that of obtaining predictions but a more modest one, it is also relevant to stress that electoral results and seat sharing also depend on many other institutional and non-institutional factors besides those electoral ones mentioned above (Scartascini et al, 2013;Spiller et al, 2010;Holm-Hadullaa et al, 2012;Schofield and Caballero, 2011;Schofield et al, 2013).…”