He too prefers exit over voice (meaning that he thinks that leaving and joining are better constraints on executive power than the ballot box).

ECONOMIST: Free cities

Still, Brian Tempest, who is about to become chief executive, believes Ranbaxy's 700 researchers can help overcome financial constraints.

FORBES: By the Numbers

Iraj Abedian, an economist and chief executive of Pan-African Capital Holdings, says a pitiful shortage of skills is one of the main constraints on economic growth.

ECONOMIST: White flight from South Africa