Yes.
I've been particularly impressed by the work of Arend Lijphart on this point. I don't believe that countries with PR systems are necessarily Edens of harmony, except that it's not hell either.
It's very important, because I think we all tend to assume instinctively—and I must say that I had exactly the same attitude—that things will go better if we have majority governments. Lijphart had the wonderful idea of looking at the indicators of good governance and found, as I'm sure he told you, that there wasn't such a big difference between countries with majority governments and countries with coalition governments, and perceptive people had seen that before.