Backed by huge digital infrastructure, India has become the biggest laboratory in the digital world where one can experiment at a scale, NITI Aayog CEO BVR Subrahmanyam said on Friday. In his keynote address at Indian School of Business (ISB) here, he said the country is expected to become a USD 30 trillion economy by 2047 surpassing the present size of US and Chinese economies. According to him, though one university and two colleges were opened every week in the past ten years, only 29 per cent of the age cohort enroll in the varsities. India has become the biggest laboratory in the digital world. A laboratory where you can experiment at a scale, which is impossible and inconceivable anywhere else, probably except the United States. Maybe we even leapfrog them for a variety of reasons, he said. Subrahmanyam said India has created a huge architecture called digital public infrastructure by going the public route rather than the private. The official further said, Estonia was the