Even as India is consumed by its upcoming elections, the world’s biggest, the country is nearing another milestone: It’s set to overtake the UK to become the world’s fifth-largest economy. By 2030, its GDP could top $10 trillion. Yet, unusually for such a geographically large and economically vibrant country, India has no states to compare to California in the US, China’s Guangdong province or Japan’s Kanto prefecture -- all regions with $1 trillion economies. Nor does it have a city on par with New York or Tokyo, both of which boast bigger economies than countries such as Canada and Indonesia,