While multi-member districts are expected to be more advantageous for women than SMDs, they may differ considerably in their magnitude, that is, the number of seats to be elected per district. In the Council of Europe member states there are, for example, PR systems in predominantly small or medium-sized districts, PR systems in rather large districts, as well as PR systems in a nation-wide district. Moreover, there are also multi-tier PR systems with districts of different sizes at various levels. Finally, with combined systems at least some of the parliamentarians are elected on PR lists.