When Sunil Bharti Mittal started in business more than 30 years ago in Ludhiana in Northern India, he borrowed $1,500 to make bicycle crankshafts. Today, he heads the $5 billion Bharti Group, whose flagship company, Bharti Airtel, is India’s largest mobile phone operator. Forbes magazine, which estimates Mittal’s net worth at some $11 billion, ranks [...]