In the case of the Fed and the stockmarket, there are two additional advantages to its reacting to rising share prices.

ECONOMIST: Central banks, all a-quiver | The

This information isn't available anywhere else in the game and it provides additional advantages to the user: If you increase you accuracy for example, you get more points.

ENGADGET: ROCCAT unveils Ryos gaming keyboard ahead of CES, individually lit keys in tow

But in finance there are additional advantages as well.

ECONOMIST: Shipbuilding

With global demand recovering and increasing chemical demand from emerging markets such as China, we expect that additional capacity expansions and economies of scale advantages should lead to market share and EBITDA margin growth for this division.

FORBES: Dow Chemical Rides To $45 On Plastic Prowess

These functional advantages ensure no further attachments-such as an additional keyboard or mouse-are required.

ENGADGET: Samsung outs new Series 5 550P notebook in the UK, Ivy Bridge and numeric keypad onboard

None of the additional classes are necessarily better than any of the starting classes, but they do have distinct advantages in certain scenarios.

FORBES: Move up http://i.forbesimg.com t Move down