We surmise it can coexist with an actual headline rate much higher than 2%.
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The headline rate of breastfeeding remaining static was a positive sign, according to Ms Campbell.
But figures released on Wednesday showed a surprise fall in the headline rate of unemployment.
First, corporate profits are subject to the corporate profits tax, some 35% currently as the headline rate.
The headline rate, widely used by wage negotiators, dropped from 3.3% to 3.1%.
The Bank last month cut the headline rate back to 0.15%, as Tokyo stocks slid to a 15-year low.
Retail price inflation also slowed sharply in September, with the headline rate, which includes mortgage interest payments, standing at 1.7%.
Among young Japanese, unemployment is nearly 10%, about twice the headline rate.
There will be a dilemma for the Bank of England, because the headline rate of inflation is likely to rise even more above target.
With VAT and the Arab Spring falling out of the figures, 2012 is the year when the headline rate of inflation should come tumbling down.
While the headline rate of unemployment has fallen in the each of the last seven months, Labour says the number of long-term jobless is nearly 150% higher than in late 2010.
America's headline rate of consumer-price inflation rose to 2.0% in October, largely as a result of dearer oil and a jump in car prices, which had been heavily discounted the previous month.
Though the government did cut the corporate-tax headline rate from 30% to 28% in 2008, it is now discussing controversial proposals to extend its tax reach over foreign subsidiaries controlled by British-domiciled companies.
But BBC business editor Robert Peston said the deal meant the licence fee would rise broadly in line with the headline rate of inflation - the Consumer Price Index, which excludes mortgage payments.
The Bank tried to play down the bad news on inflation, ascribing it to the hike in indirect taxes in July's budget and (for the headline rate) the recent increases in interest rates.
In his first Budget last month, Mr Osborne set out plans to reduce the headline rate of corporation tax by 28% to 24% over four years in an effort to show Britain was "open for business".
They may also look at what's happening to Ireland, often held out as the erstwhile Celtic Tiger example of business tax cuts - down to 12.5% headline rate - leading to increased revenue and booming growth rates.
The zone's headline inflation rate has stayed stubbornly above 2% in the past year, although core inflation (which excludes energy and food) is now 1.8%.
The rising cost of petrol pushed the headline inflation rate in the UK up to 3.3% in June - its highest level for nearly two years.
This means a low 7%ish headline unemployment rate, a stabilization in the labor force participation rate (which may have already begun in April) and accelerating GDP growth.
An energy-driven headline inflation rate of 3% hardly spells disaster.
Higher oil prices certainly push up the headline inflation rate.
While the headline unemployment rate was unchanged in April, the underlying trend is improving, with the number of people in work climbing for the fifth consecutive month to 63.5 million.
Whether the 1920s, 60s or 80s, tax revenues increase in concert with top earners accounting for a rising percentage of federal receipts whenever the headline tax rate on the rich declines.
Second, the headline inflation rate, currently 3.7%, is expected to fall sharply in the next few months, as last summer's rises in indirect taxes and mortgage rates drop out of the calculations.
However, the overall rate of headline inflation continued to fall at an annual rate of 0.8%.
Capital allowances to help investment in certain sectors look more affordable than a cut in the headline corporation tax rate.
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