The study, from online-marketing firm Vertical Response, polled close to 500 of its small-business customers about their social-media use.
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For EverQuest II, an online role-playing game, the study showed that while more men played the game, women played for more hours on average.
Among the recommendations in the 225-page study were better co-ordination with law enforcement agencies and online security assessments for schools.
There have been online courses in the US and UK for a number of years - but there has been a recent surge of interest as self-study courses have been put online by some of the world's most famous institutions.
But John Airey at the Pro-life Alliance told BBC News Online that the study in the Netherlands "shows how mistaken the Dutch are".
She wrote for the student blog, hung around online after class to get to know her professors, joined video-chat study groups after hours, and developed Facebook relationships with classmates.
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In one study of telecommuting at a Chinese online travel agency, customer-service reps were both happier and more productive when working from home -- probably Yahoo service reps aren't any different from their Chinese counterparts in this regard.
Even if teens have not actually engaged in risky behaviors but merely brag about them online, this can still affect their future behavior, said study co-author Dr. Dimitri Christakis, professor of pediatrics at the University of Washington and director of the Center for Child Health, Behavior and Development at Seattle Children's Hospital.
The study is based on two nationwide online surveys: among 511 13- to 17-year-olds who use the Internet at least occasionally, and another among 500 parents of 13- to 17-year- olds who access the Internet.
FORBES: For kids and parents, there's a digital generation gap, but maybe that's OK
The Obama administration just concluded a two-year study of how to regulate the commercial collection of consumer data online.
The study also predicts that two-thirds of all retailers with an online presence will have a formal rewards program in place within a year, although there was no discernible difference in investment returns between companies that put resources into a formal rewards program and those that don't.
Over the weekend, Google's privacy record received its harshest criticism yet: A study by London-based Privacy International placed Google dead last in its rankings of online companies for user information protection.
The study, published online Monday in the journal BMJ Quality and Safety, underscores the trade-offs in the diagnostic process: More medical tests generally improve detection, but they can also increase costs, harm patients, and produce false positives.
Over the weekend, Google's (nasdaq: GOOG - news - people ) privacy record received its harshest criticism yet: A study by London-based Privacy International placed Google dead last in its rankings of online companies for user information protection.
For a business, the cost of stocking excess inventory averages 20% to 25% of the value of the goods, according to Lehigh University professor Lawrence Snyder, who co-authored a study on how traditional stores can benefit from integrating their inventory management with their online offerings.
The study, forthcoming in the International Journal of Electronic Commerce, considers why some massive multiplayer online role-playing games such as World of Warcraft or Star Wars Galaxies, command legions of loyal players while others struggle to gain a following.
In that report, which talked about the data mining efforts undertaken by the ODNI, Reynard was described as: "a seedling effort to study the emerging phenomenon of social (particularly terrorist) dynamics in virtual worlds and large-scale online games and their implications for the intelligence community".
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