Blackstone Group LP, the largest private-equity firm, is investing in a Hindi-language newspaper to benefit from a surge in readership in India as print advertisement sales in the US fall to a 26-year low, says a Bloomberg News report. Blackstone Group plans to invest 2.25 billion rupees ($50 million) in Jagran Media Network Pvt., according to a joint statement on April 7. A unit of Jagran Media...