Clearly, private participation in infrastructure is a good - and entirely necessary - trend. And, given the existing infrastructure gap evident around the world, it also seems fairly clear that governments and public infrastructure authorities are going to need a lot more private participation in the future. But as the private sector takes on an increasing role in the delivery, funding and operation of our infrastructure, new and complex questions are starting to emerge. Who exactly controls our infrastructure? What role can and should government play in the delivery of assets and services? What will be the eventual impact of private participation on consumers and users?