As the chart shows, business investment has been the prime source of growth during America's expansion.
More importantly the prime source of revenues for both companies is online advertising.
The second thing: Everybody sees energy as a prime source of growth in the future, and we're already slipping behind.
French banks have suffered from a bout of risk aversion from U.S. money market funds, a prime source of short-term dollar funding.
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The transport bill, traditionally a prime source of bacon, does not disappoint.
In any event, the prime source of Sudan's horrors is political.
ECONOMIST: Outsiders must help to end the latest horrors in Sudan
Half of all shares traded on Kosdaq come from Internet orders, a proportion that far outstrips even the U.S. Foreign money is goosing the Kosdaq too, with America a prime source.
Mr Miliband has been urging a community-based inquiry into the riots while a Lib Dem source said Deputy Prime Minister Nick Clegg had been brokering a deal for a "victim and communities commission" into the causes of the violence.
BBC: England riots: Broken society is top priority - Cameron
The plans, which have not been accepted by the prime minister, have been portrayed as a source of tension between Conservatives and Liberal Democrats.
Although, in theory, the monarchy inhabits a realm far above the murk of daily government, it has been an important source of legitimacy for the unelected prime minister.
The squeeze on mortgages has led to the entry of "credit crunch", along with the US source of the crisis - the "sub-prime" home loan to those with a poor credit history.
"I do believe the community is willing to embrace the justice of this campaign because Australians understand that indigenous culture and history are a source of pride for us all, " Australian Prime Minister Julia Gillard said.
Our source said al-Toraihee, who is from the prime minister's party, has no prior experience that would qualify him to be an inspector general.
British Prime Minister David Cameron has been made aware of the arrest, said another source, who also spoke on condition of anonymity.
But the No 10 source rejected suggestions Mr Hayes's appointment demonstrated difficult current relations between the prime minister and the parliamentary party.
Privately, a source close to Mr Sharon fingered a source close to his Likud colleague, Binyamin Netanyahu, a perhaps frustrated former prime minister.
The situation in the south is more a source of bewilderment than alarm to most Thais, but it has dented the prime minister's aura of invincibility.
"We want to make clear that the enlargement process is irreversible, " a German government source told Reuters after talks between Chancellor Gerhard Schroeder and French President Jacques Chirac and Prime Minister Lionel Jospin.
"There are plants and companies in Romania exporting horsemeat but everything was according to the standards, and the source and the kind of meat was very clearly put as being horsemeat, " Romanian Prime Minister Victor Ponta told the BBC's Newsnight programme.
The prime minister has pledged to seek closer ties with Europe and to preserve the fishing sector, which is a major source of income for the country.
With prime brokerage (a business that caters to the trading and business needs of hedge funds) as a primary revenue source for the company, it's unclear just how much business Bear Stearns has lost in the last few days.
Deputy Prime Minister, Nick Clegg, was among those who'd been critical of the plans and a senior party source told the BBC he had "worked incredibly hard within the coalition to ensure these proposals achieve the right balance between liberty and security".
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