India, June 12 -- In his recent call to break up Facebook, co-founder Chris Hughes argued that Mark Zuckerberg couldn't fix the company, but the government can. He is part of a growing chorus. Big tech's long honeymoon period is winding down. The European Union (EU) has been less than sanguine about tech giants' market dominance and practices for some years now. The US Federal Trade Commission and Justice Department, markedly more forgiving than their European counterparts, are also divvying up competition investigations into the tech giants. Calibrating competition policy to regulate digital markets will be a tricky business. But there are opportunities here, particularly for India, where such policy is still a relatively greenfield area...