With virtual workers, companies are able to operate with zero unnecessary overhead, often saving over 30%.

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It also renders conventional monetary policy impotent, as the interest rate that prevents too much saving is below zero.

ECONOMIST: Paul Krugman's London lectures

It is based on the fact that the sum of the budget deficit, the capital inflow to finance the trade deficit, and the difference between domestic saving and domestic investment equals zero.

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This saving is more than paid for by the value of the saved generating capacity, so the net cost of saving the gas itself is less than zero.

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After the Great Recession, the continuation of near zero interest rates undermined consumer and investor confidence, discouraging people from saving and investing.

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By pegging nominal interest rates at artificially low levels, the Fed is penalizing millions of people who have their assets in saving accounts or money market funds and are getting near zero nominal returns.

FORBES: The Federal Reserve's Crony Capitalism

At the height of privatisation and contracting out, zero hours contracts were seen as a model of flexibility and cost-saving.

BBC: Zero hours contracts for NHS staff explained

Households are doing their bit, saving 9.7% of their disposable income compared with less than zero in 2004.

ECONOMIST: Petri-dish economies

Part of whatever it's saving via job cuts may now get pumped into the company's new "Zero Carbon Initiative" to not only become the greenest technology company in the world, but reduce its global carbon emissions by 15% by 2012.

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