The incentive structure in the sport means that wrestlers on the margin of achieving a winning record have far more to gain from winning than opponents, not on the margin, stand to lose if defeated.

ECONOMIST: Economics focus

Mittal could expand into Arcelor's high-margin markets, Arcelor could gain from Mittal's low-cost production.

ECONOMIST: The battle for Arcelor is about more than steel

While Apple continues to increase iPhone sales and gain more smartphone market share, its gross margin is something to watch out for.

FORBES: With iPhone 5 Looming, Margins Are What Matter

It is a huge margin to find in development and each incremental gain in performance tends to become more difficult as diminishing returns set in.

BBC: Brawn set to dominate F1

On the other end, Google is basically giving away the OS to gain presence, so it is certainly not playing a profit margin game!

FORBES: 4 Key Areas For Apple and Its Future