Morningstar, for example, awards American funds one to five stars, based on a mechanical formula that takes into account past performance, past volatility, and expenses.

ECONOMIST: Mutual funds

For rudimentary mechanical work, financial incentives do produce better performance, but performance on higher order tasks actually declines as monetary incentives increase.

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The purchase of graceful players Ronaldo and Kaka suggest Real Madrid's new president Florentino Perez has a mandate to reinvigorate not only the club's performance but a playing style which had become almost mechanical under previous president Ramon Calderon, who left the club following accusations of vote rigging.

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In addition to their outstanding performance and reliability, these drives offer durability over the long haul - as contrasted with the possibility of mechanical failure with HDDs.

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