But other big pistons in the economic machine--institutional stock traders--are now basing more decisions on a different type of Wal-Mart effect.

FORBES: Magazine Article

All three firms that signed up to distribute the machine have sold their initial stock.

BBC: Raspberry Pi buyers face delay after factory mistake

In the short term, the stock market behaves like a voting machine, but in the long term it acts like a weighing machine (i.e. its true value will in the long run be reflected in its stock price).

FORBES: Markets Haven't Changed, but Maybe You Should