There is a good Planet Money podcast on this topic: http://www.npr.org/sections/money/2015/07/31/428157211/episode-643-the-taxi-king http://www.npr.org/section

There is a good Planet Money podcast on this topic: http://www.npr.org/sections/money/2015/07/31/428157211/episode-643-the-taxi-king http://www.npr.org/sections/money/2015/07/31/428157211/episo...