That is boosted cash flow, but it has also led to lack of product in some markets, and forced RIM to ramp up production to meet demand.

WSJ: RIM Places Risky BlackBerry Bet

The flow peaked between 1965 and 1974, boosted by Idi Amin's decision to expel some 90, 000 Gujarati Indians from Uganda, after an angel had told him to do so in a dream.

ECONOMIST: Britain and India

The 0.5% cut was designed to increase the flow of money in the US financial system and boosted share prices around the world.

BBC: Radio 4's Money Box Special