Trade barriers, transport costs and differences in taxes drive a wedge between prices in different countries.
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Yet, you could try to drive a wedge between the natural rate and the real growth rate.
Life, as the book is called, is hardly going to drive a wedge between The Glimmer Twins.
Nonpartisan strategists might argue that this approach would drive a wedge between reasonable Republicans and the House radicals.
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Indonesia's justice minister, Muladi, said the bombing was a deliberate attempt to drive a wedge between religious groups.
The events have raised concern that Syria's sectarian conflict could drive a wedge between Turkey's Sunni majority and the country's Shiite sects.
Better still would be to drive a wedge between Europe and America.
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And now a new proposal, from a broad group of Palestinian intellectuals, politicians and business people, could drive a wedge between the two.
"Government policy is designed specifically to drive a wedge between global energy prices and energy bills, now and in the future, " said Mr Davy.
Price controls create shortages, and they also drive a wedge between the price of a good or service and what people are willing to pay or accept.
Its part-time Scottish secretary appears unable to counter Alex Salmond, the wily nationalist leader of the Scottish government, who aims to drive a wedge between Westminster and Holyrood.
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Mr. Maliki, apparently attempting to drive a wedge between the harder- and softer-line ministers, has vowed to fire most of those who don't attend meetings in the coming days.
More importantly, although the country's structural policies, and in particular its cosy brand of capitalism, did indeed drive a wedge between the two men, the differences appear to be largely ones of public relations.
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But there could be a more complicated plan behind the recent attack, according to Elliott Abrams, senior fellow for Middle Eastern studies at the Council on Foreign Relations: to drive a wedge between the new Egyptian government and the military.
Avoiding social-security charges, which often drive a chunky wedge between take-home pay and employers' wage bills, can both cut labour costs and thicken wage packets.
Officials sense an opportunity to drive more of a wedge between hardcore extremists and those who are wavering.
Furthermore, the North has so far failed to drive too big a wedge between the countries that share an interest in preventing it becoming a full-fledged nuclear power.
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