Proportional result- more seats party gains in constituents, harder to gain seats regionally, reduces wasted votes, more paties represented
Split-ticket voting- More choice, and with second vote can vote for diff party, encourages more parties to run
Govt with broad popularity- must be popular across whole country, if coalitions lots of parties have input on policy, greater legitimacy
Greater representation- all areas represented by constituence and regional representatives more chance that voter share ideology with rep, increases turnout