That dreaded term, PPP, is back. Experts gathered in Delhi last week to discuss various models of water-supply privatisation. Given that current political nerve centre Nagpur is cited as a success story, the urban development ministry headed by Venkaiah Naidu is believed to be partial to spreading the idea to smart cities. Well, it’s a bad idea. The success stories are in small pocket neighbourhoods, like Malviya Nagar in south Delhi. Experiences from other parts of the country, as reported by Outlook, are nothing to write home about. The matter gets more complicated if there are too many authorities, as in Delhi, or there is little or no oversight, as is the case in most cities.