Investing around themes like innovation or emerging economies often underperforms in the long run. Here’s what works instead. — In November 2001, Jim O’Neill, Head of Global Economic Research at Goldman Sachs, published an influential research report titled “Building Better Global Economic BRICs”, coining the acronym for Brazil, Russia, India, and China. He forecast that “Over the next 10 years, the weight of BRICs and especially China in world…