The issue focused attention at this week's TEDGlobal Conference on inequality and mobility in Brazil.Andre Schleicher spoke about how Uber drivers may soon have to join their taxi counterparts on the streets and ride cars instead of owning cars."Uber drivers need to decide whether they're willing to join their taxi companions or stick their necks out," said Andre Schleicher."Uber drivers don't really understand how Uber works - how Uber determines fares."Uber drivers might eventually find themselves competing against taxis - especially those charging hundreds