India is likely to produce at least a dozen more billionaires by 2020 as the country's start-ups scene hots up, an Assocham study has projected. The study said India will be among the top Asian start-up giants, along with China and South-East Asian countries. It also said that even as structural problems in China are likely to create roadblock for the start-ups there, no such issue confronts Indian start-ups.The study said the maximum value creation is expected in areas like e-commerce, music-entertainment, payment gate-ways, and city transport aggregators like radio taxis.