HowStuffWorks "How Trickle-down Economics Works"

Helping to clinch his eventual victory, Barack Obama declared in a 2008 presidential campaign ad, "The old trickle-down theory has failed us" [source: Yo­uTube]. This statement and Obama's victory resound like a death knell to an economic mentality that some say served to line the pockets of the rich. However, the trickle-down theory to which he refers remains a highly controversial topic. That Obama seeks to end trickle-down policy is certain, but what the theory really suggests and whether it has succeeded have been less clear.

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