AIDS. Rian Malan, a South African writer, recently documented how models used to estimate the number of deaths from the disease have been abandoned in quick succession as they have failed to track changes in mortality rates.
Another 21 disclose a remuneration figure for the board of directors as a whole but don't say how much individual members receive (thus for the table, we had to estimate how much the CEO was paid).
It is impossible to estimate how much money this bounty could generate for Greenland's cash-strapped government.
He said it was impossible to estimate how many pigeons were vanishing because of the transmitters.
Specifically, respondents were asked to estimate how much money they had spent on their dates.
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He declined to estimate how much the sport yacht would end up selling for.
People involved in the dispute declined to estimate how long it might take to resolve the situation.
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Dicso pointed out that SundaySky measures video performance to estimate how much its service reduces customer costs.
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First of all, you need to estimate how much your total pay is going to be for the year.
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In the 1980s Mr Groves supported the use of statistical sampling to estimate how many people the census misses.
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Studies of twins have examined a range of physical and psychological traits to try to estimate how large a contribution genes make.
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It's hard to estimate how many Americans are outsourcing their health care and what impact it's having on the country's health care system.
He also asked them to estimate how confident they were about the suspects they identified, rather than insisting on a simple yes-no answer.
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Siu and Wong testified at the trial, and they were asked to estimate how much Siu had amassed during his five-month winning streak.
He said it's too early to estimate how many plaintiffs accepted the revised offer, but Fleming said his best guess is 20, 000 or less.
They also warn the numbers may be slippery because it's hard to estimate how many gay couples would marry here if the ban were overturned.
Indeed, because they have little hard economic data for June, they had to use informed guesswork to estimate how much output fell in the month.
Currently, some doctors may use existing computer software to estimate how much additional radiation is required based on factors such as weight, height and age of the patient.
It was hard to estimate how many individual users that involved, said Brad Smith, Microsoft's general counsel, in a blogpost, because many people ran lots of separate accounts.
While it is difficult to estimate how much of an impact this trend has had on the first-quarter trade balance, it is an important trend to watch since it suggests bubble activity.
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The group measured the vibrations emitted in the chests of pigs and sheep during surgeries, and then used those calculations to estimate how much electrical energy would be generated by the harvester.
The rule of 70 is a shortcut to estimate how many years it will take to double something that compounds at a steady growth rate (say money, or demand for natural gas).
Jeff Loucks, a senior manager at Cisco who worked on the study, said 2, 415 mobile users in 6 countries were asked to estimate how much time they saved each week using their personal devices.
The researchers used a computer simulation model to estimate how many lives the screening programme could save, using data on death rates and the numbers of people affected by cancer from between 1975 and 2004.
However, he added that as there were no large-scale biorefineries in operation, the team did have to estimate how much bioethanol such a plant would be able to produce in order to calculate the net energy gain.
Although Pfizer (nyse: PFE - news - people) gets some revenue from Celebrex sales under an alliance agreement, it is difficult to estimate how Celebrex did, because the company doesn't report revenue from such agreements by drug.
If you are interested in learning more about what different government activities will cost you over your lifetime, the Independent Institute (for whom I serve as a Research Fellow) has assembled a handy website, MyGovCost.com, that will allow you to estimate how much you will pay for different government activities.
The prime minister's spokesman said the evidence from 2004 highlights how difficult it was to accurately estimate migration levels.
It still may be impossible to estimate exactly how big (or small) the eventual cost to the drugmaker will be.
First, I suspect that in the world of consulting it is hard to estimate directly how good any particular individual is.
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