And according to a 2011 Catalyst study, the number of dual-career households is even beginning to fall.
FORBES: Forget "Work-Life Balance" -- Give Us Choices Instead
In addition, according to the study, the number of companies with no women among their most highly compensated executives increased more than 12% to 65 from 58.
One well-regarded Canadian study puts the number at 30 percent.
According to an International Data Corp. study, the number of college students taking distance learning courses will triple to 2.2 million by 2002, or 15 percent of all higher education students.
CNN: fyi.com - Study: Public higher education embracing virtual classrooms
The study surveyed a number of dermatologic surgeons.
FORBES: The Looming Failure of Obamacare, Part 3: Rent-Seeking
Ms. CONDOLEEZZA RICE (U.S. Secretary of State): We're beginning a new effort to dramatically increase the number of Iranians who can come to study in America, the number of Iranian professionals who wish to visit.
On Friday, Merck said the researchers running the study enrolled another 8, 000 patients, bringing the total number in the study to 18, 000 and delaying results by a year.
The study also outlined a number of opportunities that PriceMetrix feels exist for advisors.
The study involved giving a number of subjects a series of choices involving the desirability of gambles.
Writing in the latest issue of The Lancet, the doctors called for a study into reducing the number of inappropriate admissions.
Jennifer Frances, a Cambridge University economist who is one of the authors of the study, reckons that number is way out.
The network cites a Pew Study that the total number of text messages sent monthly in the U.S. topped 188 billion in 2010.
FORBES: As Deficit Soars, Congress Suggests New Tax On Text Messages
Thus, the correct estimate of jobs gained from Medicaid expansion is only 41, 000, meaning that the study overstated the net number by roughly 25 percent.
The Medicare program provides a good case study because a large number of uninsured people, about 7.5 percent of the population, got health insurance almost immediately.
FORBES: Why Health Care Spending Will Explode Under ObamaCare: Evidence From Medicare
The study found a small number of patients had seen a health professional to talk about emotional problems - but more patients would have liked this support.
BBC: 'More support needed' for patients after intensive care
That same study found that the number one feature that consumers look for when developing a trusting relationship with a business or governmental entity is substantial security practices.
FORBES: Yet Again Consumers Rank Identity Theft As Top Concern
The current recommendation of 3 months of warfarin treatment after bioprosthetic AVR surgery is primarily based on results from 1 retrospective study with a limited number of events.
FORBES: Longer Warfarin Therapy After Bioprosthetic Aortic Valve Replacement May Be Beneficial
In fact, a Pew Research study showed that the number of 18-29 year olds buying cellphones actually fell by 3% between 2002 and 2004, while all other age groups grew.
The Hudson study found that the number of lower-calorie food and beverage servings sold increased 2.5% to 18.7 billion, while the number of higher-calorie servings sold fell 4.2% to 31.2 billion.
The study may overestimate the number of bankruptcies caused by medical bills yet underestimate the financial burden of health care on American families, because most people struggle along but don't end up declaring bankruptcy, according to Cunningham.
CNN: Medical bills prompt more than 60 percent of U.S. bankruptcies
Researchers found no difference between those who took the supplement and those who didn't, though because of the number of study participants, researchers said they couldn't rule out a small effect one way or the other in certain groups of people.
In a research note released Tuesday, Goldman Sachs (nyse: GS - news - people ) biotech analyst May-Kin Ho wrote that positive results in this study could double the number of patients eligible for the therapy to 700, 000 people.
Jonathan Berger, a professor of music at Stanford, said he had conducted an informal study among his students and found that, over the roughly seven years of the study, an increasing number of them preferred the sound of files with less data over the high-fidelity recordings.
Others worry that urban research could, just like other fields of study, start to put number-crunching ahead of other important questions.
Their study also revealed that the number of total hip replacements using non-cement prostheses actually increased after NICE issued its guidelines.
The study compared a relatively small number of women who had undergone the procedure - called oopherectomy - with those who had not.
If this new study can both increase the number of people taking cholesterol drugs (20 million Americans already take them) and gain market share within the category, that sounds about right.
The TRAC study also determined that the number of federal weapons prosecutions has fallen nearly every year in the U.S. from a high of 11, 015 in 2004 to 7, 774 in 2012.
This study also found that the number of safeguards used across the studied firms (which accounted for over 90% of the U.S. gun sales) was very low, averaging less than one safeguard (.77) per firm.
On a conference call held by Merck, research chief Peter Kim emphasized that the Duke study had reached the total number of heart attacks, strokes, and other heart problems it would need to get a statistically clear answer.
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