Asia needs more transport infrastructure. More than the state, which finances the lion's share, can fund. So what more can be done to bring in increased private capital, when investors have so far been mostly disappointed by the returns? Is there a way of breathing new life into the public private partnership (PPP), the most common vehicle for private infrastructure investment? We think so. Governments need to offer private sector investors more than they can hope to earn from ticket sales on railways or motorway tolls. They should consider sharing the extra tax revenues generated from the increased economic activity...