See, e.g., the discussion in http://www.economist.com/node/3984019 http://www.economist.com/node/3984019 Break-up of the big four has been proposed, I see in t

See, e.g., the discussion in http://www.economist.com/node/3984019 http://www.economist.com/node/3984019 Break-up of the big four has been proposed, I see in this mornings Financial Times: http://www.ft.com/intl/cms/s/0/a4f58dba-1a89-11e1-ae4e-00144feabdc0.html http://www.ft.com/intl/cms/s/0/a4f58dba-1a89-11e1-ae4e-00144...