It is, of course, entirely possible to over estimate the impact of a minimum wage rise.
Thus, he says, investors tend to under-estimate the potential for diversification strategies when the economic going is tough, and to over-estimate it when things are booming.
But these data do also suggest that national results might over-estimate the rate of progress.
They constantly over-estimate their abilities and under-estimate the risks and threats around them.
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Buyers registered from 33 different countries for the auction, where every lot sold, most of them for way over the estimate.
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That valuation excludes a change of control premium, which Bank of America estimates should be between 20% and 30% over their estimate.
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It is hard to over-estimate the gravity of Japan's situation.
Sir Alan says that many schools under or over-estimate the number of pupils with special needs, and that this leads to an incorrect level of provision for these pupils.
One is to over-estimate Britain's part in world affairs.
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As a study by UCLA found in 2007, the human brain is wired to over-estimate the size of risks, underestimate your ability to handle them and downplay the costs of not taking them.
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Using the latest brain imaging technologies, researchers have been able to prove that we human beings are neurologically wired to over-estimate the size of risks, under-estimate our ability to handle them, and downplay the costs of inaction.
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Corn prices soared 34 percent after USDA slashed its yield projection 12 percent over a previous estimate.
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Planning and funding setbacks delayed completion from 2003 to 2006 and pushed up the cost by 18% over the original estimate.
Here are the nine stocks that made the cut, along with the percentage change in consensus EPS estimate over the past four weeks.
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ConAgra reported earnings of 47 cents per share, excluding costs related to hedging higher commodity prices, over the analyst estimate for 43 cents per share.
"Speed is at the centre of a customer's decision to buy broadband, so the findings that only 59% of ISPs gave an unprompted speed estimate over the phone is disappointing, " he said.
However, a key point is that they do not estimate this over the entire life of the account, but rather use an arbitrarily truncated time horizon to estimate the effects.
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Reitzes now expects PC units to grow 16% year-over-year in 2010 (down from an earlier estimate of 19%) and to increase 10% year-over-year in 2011 (down from an earlier estimate of 11%).
The 6.1% decline is an advance estimate that may be revised over the next two months (the advance estimate regularly changes by a full percentage point or more once the Commerce Department has more complete data).
We estimate that over 70 of the buildings on the register are capable of beneficial re-use.
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All told, local reports from Russian TV estimate that over 900 people were injured.
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This brings our new iPhone sales estimate to over 51 million for the December quarter.
Analysts estimate that over 4 billion hours of user-generated content is watched each month on YouTube alone.
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By one estimate, over 100, 000 smallholders have given up in the last decade.
"I can estimate that over 20% of our top line is lost to the activities of these guys, " says Nnamdi Okafor, the managing director May and Baker Nigeria PLC.
The parent of KFC and Pizza Hut saw same store sales fall 20% in the two-month quarter, an improvement over their 25% estimate, fueling a rally that saw shares rise nearly 7% by 4:44 PM in New York.
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Shares trade for 19 times my 45-cent estimate for earnings over the next 12 months.
The consensus estimate has fallen over the past three months, from a loss of 13 cents.
"We estimate there was over 200 shots fired in a five- to 10-minute period, " Deveau said.
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